Edits slowly flip back and forth between edited & original state.

[ara4n]

Steps to reproduce

1. Send a message
2. Edit it (perhaps while it's still sending)
3. Watch as you get a nice local echo for the edit
4. Then, a few seconds later, it suddenly reverts to the unedited state (presumably the original remote echo arriving?)
5. Then, a few seconds later, it eventually reverts back to the edited state (presumably the edited remote echo arriving):

edit.sluggish.mp4

Outcome

What did you expect?

Edits shouldn't flap around.

What happened instead?

Since build 847 this seems to happen more frequently - roughly 50% of the time, and it's much slower as it flaps.

See also #2252 which may or may not have been the same issue.

Your phone model

No response

Operating system version

No response

Application version

847

Homeserver

No response

Will you send logs?

Yes

[bnjbvr]

Thanks! already tracked in matrix-org/matrix-rust-sdk#3905.