bug#54646: 29.0.50; set-fontset-font and font clipping issues

[Visuwesh]

[சனி ஜூன் 11, 2022] Visuwesh wrote:

> [...]
> However, I have been using the xft+harfbuzz combo for a ~week now and I
> can say with confidence that I don't experience this strange issue.  I
> would highly appreciate it if the decision to remove the xft backend
> could be delayed until a solution comes up [1].  Although the font
> rendering is worse, the text stays readable at all font sizes.

I made some "progress" on this bug report.  The misplacement goes away
when I close _all_ frames open on the Xorg display and open a fresh new
frame.  If I only close the frame visiting the problematic buffer and
open a new frame to visit the buffer again, the misplacement does not go
away.
AFAIK, this workaround is not possible in "emacs -Q" since there is no
way to close all frames without also exiting Emacs.  I tried to leave
the "original" frame around and opening a new frame but that did not
help.