Missing timeline history (Scrollback getting completely lost) #2650
Labels
A-Timeline
O-Occasional
Affects or can be seen by some users regularly or most users rarely
S-Minor
Impairs non-critical functionality or suitable workarounds exist
T-Defect
X-Needs-Rust
This issue needs a Rust SDK change. It must have a link to a Rust SDK issue
Comments
Velin92
added
S-Minor
ara4n
changed the title
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So this is likely one instance of matrix-org/matrix-rust-sdk#3312 that happens a lot for coincidental reasons: sliding sync || synapse sending duplicate fully read marker events, causing the event cache to forward one "update" per fully read marker, spamming the Rust channel the timeline is listening to, and the timeline concluding that it may have missed important info, and clearing itself. While the long-term general fix will likely be something like the above PR, the short-term fix is to have the event cache ignore duplicate read marker events for a given room, which this PR does, and that should avoid most instances of this bug for most people. |
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Fixed in matrix-org/matrix-rust-sdk#3321 |
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Steps to reproduce
In build 566, view a room. Chances are that large hunks of history will go missing, and new messages may not arrive. Going to room list and back again fixes it.
Outcome
What did you expect?
Reliable timeline
What happened instead?
Deeply unreliable timeline
Your phone model
No response
Operating system version
No response
Application version
566
Homeserver
No response
Will you send logs?
Yes
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