Comment 7 for bug 1940836

I have the same problem, with Calc only, in LibreOffice 7.3.7.2, installed from package libreoffice-calc 1:7.3.7-0ubuntu0.22.04.4
My graphics is an old ingegrated Intel HD (Ironlake), that runs everything else on the system perfectly fine.

Typing short sentences very fast, the display is always one sentence behind. Just holding down one key prints the characters noticably slowly, in blocks of approx. five at a time. At the same time, the XOrg process maxes out the CPU.

Disabling HW accelearation had no effect.
Running without GTK3 (using SAL_USE_VCLPLUGIN=gen), the problem disappears, but the UI looks bad.