(#qchnx6q) Okay, now that I knew what to look for, I found existing bug reports:

• https://lists.gnu.org/archive/html/groff/2023-04/msg00400.html
  
• https://savannah.gnu.org/bugs/?63960
  

Most importantly:

This is resolved in the groff trunk.

🥳

(#vv4diza) Speaking of groff: I’ve been following their mailing list for a while now and this G. Branden Robinson person invests an insane amount of energy into that project. 🤯