I do 99% of my forum work using Chrome (“most recent”) on Linux (openSUSE).
I don’t think I have ever seen this issue, but as moderator I do have some expanded powers (few of which I really understand).
Given you varied experience, I am not sure what to raise with Word Press, the forum tool provider.
I am wondering if your experience is browser cache related.
When you hit it again, try ‘clearing cache’ and reloading the browser page – make a difference?