Message content can be shown incomplete until scrolled off-screen and back

[rom4nik]

Steps to reproduce

1. Have some kind of message in room (I'm not sure of specifics yet, see video below)
2. Notice that the message appears shorter than a few seconds ago
3. Scroll it off-screen and back

Outcome

What did you expect?

Message is shown in its entirety at all times.

What happened instead?

screen-20240103-175713-.00.55.575-01.17.824.-.00.09.650-00.16.171.mp4

For some reason it's this glitch happens somewhat repeatedly on this particular message. Rageshake sent before recording this video, after another occurrence on the same message, where the message was initially showing da, then after scrolling up and down once it showed full content, then after a few more scrolls it showed da. a jak wysyłasz, then after a scroll it showed full message again.

I don't think I've ever seen this on 87c8bc1 (previous version I've used) or older builds.

Your phone model

Google Pixel 3

Operating system version

Android 13

Application version and app store

4f6c742, GHA debug build

Homeserver

Synapse 1.98.0

Will you send logs?

Yes

Are you willing to provide a PR?

No

[rom4nik]

A few more recordings:

screen-20240104-095057-.00.00.000-00.09.711.mp4

Additionally, in video above, when the full message is shown the text overlaps the timestamp.

screen-20240104-094652-.00.00.000-00.41.613.mp4

Timestamps for video above:

1. 12s - full message appears after full scroll off-screen
2. 12-29s - scrolling and opening an image a few times, message still shown in full
3. 29-32s - scrolling and opening an image once, scrolling down has a bit of stutter, message now shows only first word again
4. 34-39s - scrolling and opening an image a few times, message still shown in full

screen-20240103-205851-.00.22.950-00.30.458.mp4

And in video above the message is shown in full, but the timestamp first appears in correct place (extending the bubble a bit), but after a scroll off-screen and back, it's overlapped by text - similar to first video in this comment.

So far it looks like this stuff happens only on messages which are replies.

[frebib]

I've not been able to reproduce the strange words-disappearing bug but I do have a few more instances of timestamps overlapping the message. I'm noting this here because it can be reproduced by scrolling the message on/off the screen

[bmarty]

Yes, it may come from ContentAvoidingLayout. We may want to fix this before the next release.