Sometimes when I visit my group page, the announcement banner image is unexpectedly cropped despite being the correct aspect ratio and usually shown uncropped.
The only thing that fixes it is refreshing the page.
I suspect the issue is related to the page lazy-load and resource caching, and/or some sort of responsive cutoff in the page styling. The problem does not reoccur after I’ve visited the group page and refreshed. It only reoccurs once in a while, every few days or something, or maybe on a fresh PC boot, I haven’t checked.
Also note, the image has different padding/margins when it is cropped incorrectly.
It is incorrectly cropped here:
It is shown correctly here after refreshing the page:
Using Windows 11 in Chrome.

