After one of the 2023 updates (perhaps since March), when loading the home page, the columns seem out of whack. This only happens in Firefox (v115.0.2) (I have also tried private window with all extensions disabled), but not in Chrome (v 114.0.5735.199). Resizing the window so that the number of columns changes seems to fix this. I have also tried clearing cache. Reloading the page, or navigating away and then back reproduces the issue. I looked in the dev console and there aren’t any messages shown there.
HA info (running on an Intel NUC):
Home Assistant 2023.7.3
Supervisor 2023.07.1
Operating System 10.3
Frontend 20230705.1 - latest
FF: 117.0.1 (64-bit)
Home Assistant 2023.9.2
Supervisor 2023.09.2
Operating System 10.5
Frontend 20230911.0 - latest
Even opening the dev console (which is embedded) and hovering over the body element fixes it. It seems like there is a call to adjust to screen resolution that happens at the wrong time (before loading of the page is complete) or something along those lines.