chris27106 a lot of the controls, particularly when posting or replying to an existing thread, have no labels whatsoever.
I presume you’re referring to buttons like these:
As the screenshot above shows, the buttons do show useful information in desktop mode, but I’m guessing this is not being done correctly to work with assistive technology.
Looking at the code behind it, it seems this is being done with a Title attribute:
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img seems to imply that this might be better done with an Alt tag but there are other considerations mentioned, so I’ll tag this for @ianmorland for him to have a look at.