Fixed Images in posts overlap with content when loaded

Device: laptop
Browser: Chromium, Chrome, Firefox
OS: Windows 11

Steps to reproduce:

Open any topic with posts with images. A recent example: post3680926.html#p3680926 .
Notice that if the post contains an image, only a small space is reserved for the image before it's loaded:


After the image is loaded, it doesn't push the content (such as the next post) below, but somehow overlaps with it:


Such a bugged layout stays until I scroll down, only then it is rendered properly.

Anything else to add:
Seems to be browser-agnostic. Checked on Chromium and Firefox.