Problem displaying a video in the chat history leads to scrolling problem

[Raiden-GH]

I noticed that DC-iOS has trouble displaying a certain video in the chat history.
Sometimes it is shown with and sometimes without a border:

It may be due to an unfavorable aspect ratio?

As more chat messages appear, the video keeps moving up until it is no longer displayed.
This problem occurs when scrolling back:

Scrolling.Bug.mp4

But this stuttering does not occur when swiping very quickly.

iOS 17.4.1
DC-iOS 1.44.1

[r10s]

as this might have been fixed with #2315, this needs a retry with the next release or testflight

EDIT: closing, testflight is out, please reopen or file a new one if the issue persists

[Raiden-GH]

The bug still occurs in DC-iOS 1.48.3, now only when scrolling in the opposite direction.

[r10s]

i've seen sth similar unrelated to a video, for an image.

• "special" about this image is only that it is relatively small (230 x 248 pixels)

• the issue appears sometimes, also after it was displayed once correctly, so if this is caching issue, it is not about a cache that it persisted to disk

so, maybe the height calculation is not always stable, leading to scrolling issues then (i could not reproduce the scrolling issue, though)

[Raiden-GH]

Maybe I should send the video? It's not big. This way the bug is easier to reproduce. It's compressed in GitHub, so I don't know if it will work then. So via Delta Chat?

[r10s]

yeah, feel free to send it to me :)