Matrix 消息“静默丢失”排障：先做时钟偏移治理再看网关链路

• Matrix channel is enabled and you can access both gateway host and Matrix homeserver time settings.
• NTP/chrony/systemd-timesyncd can be configured on both sides.

1. Reproduce with one controlled Matrix message and confirm symptom: outbound appears sent but peer side misses event.
2. Check wall-clock and NTP sync status on both gateway and homeserver; measure skew in seconds.
3. Correct clock skew (enable/restart time sync service) and keep timezone handling consistent.
4. Re-run Matrix send/receive regression and monitor for silent drop disappearance.

• Different Linux distros use different time-sync daemons; adapt commands to your environment（需验证）.
• If media/event payloads are blocked by ACL/proxy, time fix alone will not solve delivery issues.

This tip is aggregated from community/public sources and preserved with attribution.