Live Feed auto-scrolls and does not retain position in feed after images are viewed

[codelesscody]

Steps to reproduce the problem

1. While logged in, switch to LIVE FEEDS, ALL (so posts are constantly being added to the top of the feed)
2. Expected behavior: when you are at the top of the page, new posts appear at the top frequently.
3. Expected behavior: when you scroll down a bit, new posts will continue to load above, but your view stops scrolling (you can see browser scrollbar moving and getting smaller)
4. Expected behavior: when you click on an image, the image is enlarged and the feed remains still behind the image.
5. UNEXPECTED BEHAVIOR: when you click off the image, your position in the feed is lost -- your view of the feed is scrolled up by however many posts were added to the top of the feed while the image was on screen. You have to scroll down a bit to get back to where you were in the feed.
6. UNEXPECTED BEHAVIOR: In Firefox (on both Windows11 and Linux), while the image was viewed, the screen flashed every time a new post was added. I did not notice this behavior in Windows11/Edge.
7. NOTE: The position of the feed behind the image doesn't move while the image is viewed, but once the image is clicked off, the feed jumps up several posts based on however many posts loaded in the meantime.
   ...

Expected behaviour

When I click off the image, my view should still be at the position of the image's post that I clicked on.

Actual behaviour

After clicking off the image, window scrolls up to newer posts.

Detailed description

All described in steps to reproduce. Live Feed position is not retained when an image is viewed.

Mastodon instance

infosec.exchange

Mastodon version

v4.3.0-alpha.3+glitch

Browser name and version

Firefox 125.0.3

Operating system

Arch Linux and Windows 11 (both fully patched)

Technical details

No response