New bug in change tracking?

[Paul A. Rubin]

Can someone confirm that (a) I'm not hallucinating and (b) this is a new 
bug (I couldn't find it in the issue tracker)? Create a test file with 
any text, and turn on change tracking. Then change fonts on some words 
(italics, bold, san serif, ...). None of the font changes are flagged as 
changes. Adding or deleting characters still register as normal.

This is LyX 2.3.5-1 on Linux Mint 19.3.

Paul