Loon Proxy App Struggles to Load X Videos on iOS

Loon Users Report Widespread X Video Loading Failures

Loon, one of the most popular iOS proxy and network management apps, is experiencing significant issues loading video content on X (formerly Twitter), prompting a growing number of users to switch back to competing tools like Quantumult X (QX) and Shadowrocket. The problem appears to affect video playback specifically, while text-based posts and other media platforms like YouTube continue to function normally through the same proxy configurations.

The issue has sparked widespread discussion among power users of iOS network tools, with many pointing to potential QUIC protocol conflicts as the root cause — though disabling QUIC has not resolved the problem for most affected users.

Key Takeaways

• Loon proxy app fails to load video content on X (Twitter) for a significant number of iOS users
• Text content on X and video playback on YouTube remain unaffected
• The QUIC protocol was initially suspected, but blocking it does not fix the issue
• Users running popular rule sets like 'Keli' (可莉) configurations are particularly affected
• Quantumult X and Shadowrocket handle the same traffic without issues
• The problem highlights deeper compatibility challenges between proxy apps and evolving social media protocols

The Technical Breakdown: What Is Going Wrong?

The failure appears to be isolated to video media loading on X when traffic is routed through Loon's proxy engine. Users report that timeline text, images, and profile content load without any issues. The selective nature of the failure strongly suggests a protocol-level incompatibility rather than a simple connectivity problem.

Initial community troubleshooting focused on the QUIC (Quick UDP Internet Connections) protocol, which X and many other modern platforms use to deliver media content more efficiently. QUIC operates over UDP rather than TCP, and some proxy tools struggle to handle QUIC traffic properly. However, multiple users confirmed that adding QUIC-blocking rules to their Loon configurations — a common fix for similar issues in other proxy apps — did not resolve the video loading problem.

This points to a potentially deeper issue within Loon's traffic handling engine, possibly related to how the app processes HTTP/3 connections or handles specific media CDN (Content Delivery Network) endpoints that X uses for video delivery. X has been actively updating its infrastructure since Elon Musk's acquisition, including changes to how media content is served and cached.

Why Quantumult X and Shadowrocket Still Work

The fact that Quantumult X and Shadowrocket handle the same proxy nodes and similar rule sets without experiencing video loading failures is telling. These 3 apps — Loon, QX, and Shadowrocket — represent the top tier of iOS proxy tools, but they each implement traffic interception and forwarding differently under the hood.

Quantumult X and Shadowrocket both offer a more straightforward approach to proxy configuration:

• Direct node selection without complex rule dependencies
• Whitelist-based routing where domestic traffic bypasses the proxy entirely
• Simple mode switching between rule-based and global proxy modes
• Manual rule additions for edge cases that automated rule sets miss
• Mature QUIC handling that has been refined over multiple update cycles

Loon, by contrast, relies more heavily on comprehensive rule set subscriptions — pre-configured collections of routing rules maintained by community contributors. While these rule sets (like the popular 'Keli' configuration) offer convenience, they can introduce unexpected conflicts when platforms like X update their infrastructure.

The Rule Set Problem: Convenience vs. Control

One of the core issues highlighted by affected users is the trade-off between convenience and granular control in modern proxy apps. Loon's approach of using subscription-based rule sets like 'Keli' simplifies setup for most users but can create problems when specific platforms require custom handling.

Users who switched back to Quantumult X or Shadowrocket reported that their preferred workflow — using rule-based mode for everyday browsing and switching to global proxy mode for specific needs — was more difficult or impossible to replicate in Loon with certain rule set configurations.

This workflow difference matters significantly for power users:

• Rule mode routes only specific traffic through proxy nodes, reducing latency and bandwidth usage for domestic content
• Global mode sends all traffic through the proxy, useful for accessing geo-restricted content or troubleshooting connectivity
• Manual rule additions allow users to add specific domains or IP ranges to their proxy or direct-connection lists
• Node selection flexibility lets users choose optimal servers for different services

The inability to seamlessly switch between these modes in Loon — particularly when using community-maintained rule sets — represents a significant usability gap compared to QX and Shadowrocket.

X's Evolving Infrastructure Complicates Proxy Compatibility

Since Elon Musk's acquisition of Twitter and its subsequent rebranding to X, the platform has undergone substantial technical changes. These include server infrastructure migrations, CDN changes, API modifications, and updates to how media content is delivered to clients.

X has been increasingly aggressive about optimizing its video delivery pipeline, leveraging newer protocols and CDN configurations that may not be fully compatible with all proxy implementations. The platform's video infrastructure now handles everything from short clips to long-form content and live streams, each potentially using different delivery mechanisms.

For proxy app developers, keeping up with these changes requires constant monitoring and updates. Shadowrocket, maintained by a responsive solo developer, and Quantumult X, known for its robust engine, have historically been faster at adapting to platform changes compared to Loon.

The situation also reflects a broader trend in the proxy app ecosystem: as major platforms become more sophisticated in their content delivery, the technical bar for proxy tools to maintain full compatibility continues to rise.

What Affected Users Can Do Right Now

For users currently experiencing X video loading issues on Loon, several workarounds and alternatives are available while waiting for a potential fix:

• Switch to Quantumult X ($7.99) or Shadowrocket ($2.99) as immediate alternatives
• Try different rule sets in Loon — the issue may be specific to certain configurations like 'Keli'
• Test different proxy nodes — some server locations may handle X video traffic better than others
• Monitor Loon's update changelog for fixes related to video streaming or QUIC handling
• Report the issue to Loon's developer through official channels with specific details about the failure
• Check X app updates — sometimes client-side updates resolve CDN compatibility issues

Users migrating to QX or Shadowrocket should consider setting up a domestic whitelist combined with manual rules for services that need specific routing. This approach provides the best balance of performance and accessibility.

Looking Ahead: The Future of iOS Proxy Apps

This incident underscores a growing challenge in the iOS proxy app market. As social media platforms and streaming services adopt increasingly complex content delivery architectures, proxy tools must evolve in parallel or risk becoming unreliable for everyday use.

The competitive landscape among Loon, Quantumult X, and Shadowrocket has historically driven rapid innovation, but the X video issue highlights that not all apps adapt at the same pace. Loon's developer will likely need to address this issue promptly to prevent further user migration to competing apps.

For the broader user community, the takeaway is clear: maintaining familiarity with multiple proxy tools and keeping configurations portable across apps is becoming essential. No single app can guarantee perfect compatibility with every platform indefinitely.

The situation also raises questions about the long-term sustainability of community-maintained rule sets. As platforms change their infrastructure more frequently, the gap between rule set updates and platform changes will continue to create windows of incompatibility — making simpler, more user-controlled configurations increasingly attractive for power users who demand reliability above all else.