Weird scroll-animation/jumps in Chat

[r10s]

sometimes, there is some unneeded scrolling of the message list:

instead of just shifting the view some pixels up in case of a new message,
scrolling takes place from the very top to the bottom.

this issue is pretty old, but here is a way to get a reproducible comparison with correct scrolling:

• open a filled the "Saved Messages" chat
• send a first short message "s1" -> scrolling is fine, just a few pixels up
• send a second short message "s2" -> scrolling from very top to the bottom, same for subsequent messages from the same device

leave the "Saved Messages" chat open, but now send a message from another device:

• messages "o1", "o2" -> scrolling is fine, just a few pixels up
• from same device, "s3", again -> scrolling from very top to the bottom

so, question is, what is the difference between wrong s2, s3 and fine s1, o1, o2

RPReplay_Final1720705004.mov

(ignore the flickering scroll down button, see here)

---

Note to self:

let messageId = ui["message_id"] as? Int ?? 0
if messageId > 0 {
    let msg = self.dcContext.getMessage(id: messageId)