My Alt Text vanished!

[checkman]

I’ve been adding alt text to some .docx files over the past few days (25.2.7.2, macOS Sonoma) and exporting them as PDFs, which are fine. But earlier today, I went back to one of my files, and all of my Alt Texts are missing.

Is this a known bug?

The only thing that I might have done is that I set up a hotkey to bring up the Alt Text menu to save some mouse clicks. But this is happening to some files that I haven’t touched since I did that.

[checkman]

Here’s a sample file. Right-click on the R3 thing, add some Alt Text, and save the file. Then close it and re-open it, and the Alt Text isn’t there any more.
demo.docx (8.6 KB)

[EarnestAl]

Maybe this page explains, How can I add alternate text to equations in Word? - Microsoft Q&A