Scrolling: Stuck in scroll loop

[lampholder]

Steps to reproduce

I joined a room with a lot of scrollback over a short period (I reckon < 1 week). I tried to scroll to the top to read the whole thing, but I got stuck in a "scroll loop" - continuing to scroll upwards (with the mouse wheel, or interacting with the scrollbar) would scroll up a bit, glitch as if it were loading more content, then actually drop me further down (in the future) in the timeline so I saw the same fragments of conversation over and over.

I don't seem to be able to get to the top of the room.

Outcome

What did you expect?

Able to scroll up

What happened instead?

Stuck

Operating system

Windows 10

Application version

Element Nightly version: 0.0.1-nightly.2022090501 Olm version: 3.2.12

How did you install the app?

website

Homeserver

lant.uk

Will you send logs?

Yes

[MadLittleMods]

As a note, to get better logs around what is happening:

To better debug timeline issues when they crop up.

Turn on:

mxSettingsStore.setValue('debug_scroll_panel', null, 'device', true);
mxSettingsStore.setValue('debug_timeline_panel', null, 'device', true);

Turn off:

mxSettingsStore.setValue('debug_scroll_panel', null, 'device', false);
mxSettingsStore.setValue('debug_timeline_panel', null, 'device', false);

-- matrix-org/matrix-react-sdk#8513