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

deltachat / deltachat-ios

Email-based instant messaging for iOS.

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Open Raiden-GH opened 6 months ago

Raiden-GH commented 6 months ago

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:

Normal Rand

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:

But this stuttering does not occur when swiping very quickly.

iOS 17.4.1 DC-iOS 1.44.1

r10s commented 1 month ago

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 commented 1 week ago

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

r10s commented 1 week ago

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)