Hiddify Is Slow or Frequently Disconnects: Node, Network, and DNS Checks

“Slow” can mean high latency, low download throughput, a long wait for the first page, incomplete images, or a connection that resets every few minutes. Define the symptom first, then compare under the same test conditions. One speed test or node-latency result cannot establish the root cause.

Symptoms

• Latency results vary sharply and nodes switch frequently.
• The first page takes a long time to appear, or images and videos do not finish loading.
• Wi-Fi works while mobile data is slow, or the reverse.
• Persistent disconnects began only after upgrading Hiddify.
• System proxy works normally, but TUN/VPN is slow or times out.
• The same subscription works on another device, while the current device remains unstable.

Two-minute diagnosis

1. Record the time, network type, Hiddify version, connection mode, current node, and exact symptom.
2. Test latency in the proxy list and manually pin one node so automatic switching does not disrupt the comparison.
3. On the same device and with the same website or download target, test Wi-Fi and a mobile hotspot separately.
4. On the same network and node, compare system proxy with TUN/VPN.
5. Retest the same subscription on another device. If several devices slow down together, check the node and server first.

The official usage guide explains proxy latency tests and manual node selection. Latency reflects one specific test request, not the complete experience of webpages, downloads, or video.

Troubleshoot by layer

Client: reduce variables

• Quit and restart Hiddify completely, then pin a known-good node.
• Pause other VPNs, proxies, accelerators, and traffic filters to avoid double routing.
• Restore advanced DNS, routing, MUX, fragmentation, and TUN options to their defaults before establishing a baseline.
• Compare the version with the official Releases. If the problem began after an upgrade, record the before and after versions, system, and network instead of blindly downgrading from a third-party download site.
• If system proxy works and TUN is clearly abnormal, use the TUN mode troubleshooting guide to check privileges and routing.

Subscription and nodes: distinguish one node from a general failure

• Manually test at least two different nodes, changing only the node each time rather than the protocol and DNS at the same time.
• If one node is slow and others work, the problem is usually that node’s route, load, or regional path.
• If every node slows down together, check the account’s traffic, speed limit, expiry, and provider announcements.
• A failed subscription refresh can leave the client using old nodes; resolve Subscription update failed first.
• Do not replace your own network test with public speed-test results or treat one momentary peak as sustained speed.

DNS/TLS and the access network

• “The domain opens slowly at first, but transfers normally after connecting” is more consistent with DNS or connection setup. Check the log for dns, timeout, or TLS errors.
• Test on another network first, then restore the default DNS or use settings explicitly recommended by the provider.
• Correct the system time to rule out HTTPS certificate-validation problems.
• If the failure belongs to one carrier or mobile network, record the network type and time for the provider to assess the route instead of assuming that a public DNS will always fix it.

Issue #1976 in the official repository records a user case where a specific version showed a connected state but abnormal traffic on some networks. In the discussion, the same DNS change did not help everyone. Version, network, and protocol therefore need separate tests; one comment is not a universal solution.

Server and upstream route

• If the same node is slow across several devices and networks, the provider should inspect node load, ports, upstream connectivity, protocol parameters, and speed limits.
• If one node always times out while others work, provide its name and the time of occurrence, not the subscription token.
• If all provider nodes work and only one website is slow, the problem may be in that website, its CDN, or its route rather than Hiddify.

Verification

Record before and after results against the same target instead of relying on a feeling:

Treat the issue as resolved only after the same node works three consecutive times, commonly used websites and apps work, reconnects no longer occur at the previous frequency, and the system network recovers after disconnecting.

When to contact the provider

Contact the subscription provider when multiple devices and networks are slow, the account may be rate-limited, one node remains abnormal, many nodes time out, or the server reports certificate or protocol errors. Provide the node name, time, carrier/network type, and redacted logs.

If the same subscription remains stable in other clients and the problem consistently occurs only in one Hiddify version, submit the controlled comparison to the official Issues. Do not publish the complete subscription URL, UUID, server IP, token, or unredacted logs.