Safari text scaling issue

Wondering if anyone else has this same issue. When I'm using Safari in fullscreen mode, text on websites will randomly decide to shrink to an unreadable level. I've tried setting the "Never use font sizes smaller than..." setting to "14" but still get this issue. Doesn't seem to matter if I have that setting enabled or not, text still shrinks all on its own. The only way to "fix" is to exit fullscreen, which immediately resets the fonts to their correct size. Apple support has suggested disabling login items, disabling Safari extensions, and force quitting Safari. None of these has done anything to fix the issue. Now they are recommending that I reinstall the OS on my Mac mini M4 that's like 2 months old. Seems like it's a programming error. I would like to be able to use Safari but this is getting incredibly annoying