That does sound annoying! I wasn't aware of it as I'm unable to see any alt text since swapping to the Firefox browser.
None of the apps worked for me when I joined fedi and so I just added it to my screen as a kind of web app thingy.
I got the alt text when I was still on chrome and doing that, but haven't found a way to access it since using Firefox.
Which is a shame, because I enjoy good alt text, it helps everyone!