A user reported some corrupted frames when scrolling in the Zulip beta app, which uses Impeller. The device is a Fairphone 3+. I haven't seen or heard of similar symptoms on other devices.

Screenshots from the user:

Normal	Scrolling	Scrolling more

Further description:

Curiously, when I try to record my screen on the phone, the glitches don't appear. As soon as the screen recording is stopped, they appear again when scrolling.

I was however able to capture some screenshots of what it looks like. These are only visible for a frame each, but while scrolling there are a lot of such glitches.

Original user report:

• Visual glitches when scrolling on Fairphone 3+ zulip/zulip-flutter#941

The app that reproduces the issue can be installed from Google Play; it's in open testing.

The build can be reproduced with:

$ git clone https://github.com/zulip/zulip-flutter
$ cd zulip-flutter
$ git checkout v0.0.19  # aka 371f090d9eed5fdc53ea03efc2dad018ca2143bc
$ flutter run --release

using flutter/flutter commit 6c3677c, aka Flutter 3.24.0-1.0.pre.518.