Extreme stuttering in every part of the app

[rezun]

Summary

Every part of the UI (scrolling, all animations) is stuttering extremely.

Environment Information

• Device Name: Samsung Galaxy S20
• OS Version: Android 11, OneUI 3.0
• Mattermost App Version: 1.39.0
• Mattermost Server Version: 5.30.1

Steps to reproduce

It's a persistent issue on my phone.
Don't think it's easily reproduceable.

Observed behavior

I have this issue for a few months now.
Every part of the UI is extremely stuttering and it feels like it's running at 10 fps.
I've reinstalled the app, tried the beta version and testet it with the 120hz and the 60hz display mode, but the problem persisted.
I haven't found similar reports and my colleagues don't seem to have this problem.

mattermost.mp4

[rezun]

One other important thing I noticed.
This seems to have something to do with text rendering.
If mostly images are shown, the app scrolls smoothly, as shown here.
I also have not seen this in any other app on my smartphone. So, my web renderer doesn't seem to be broken in general.

Mattermost.2.mp4

[scabux]

Can confirm this problem on a similar device.

[VincentSC]

Can confirm on Samsung Note 10. I think it has to do with OneUI 3.0, as since then it started to be unusable. Other apps don't have the problem, AFAIK.

edit: seems more software is having this problem with OneUI 3.0, but most has been fixed in the past months.
I tried all my quirky and scrolly software installed on this phone, but literally none of these has the problem. I suspect mattermost-mobile to use deprecated functions, but have not checked myself as I have not installed Android Studio on this PC.

It could also be a problem with Android 11

[VincentSC]

Here are some tips where to look into: https://developer.android.com/topic/performance/vitals/render#common-jank

[jfolz]

Probably a duplicate of #5046, also Samsung devices after update to OneUI 3.0.

[rezun]

Yes. It is a duplicate. Didn't see the other issue.