The very last update of LO brings a very surprising bug : when I click on some icons bringing a specific panel, the mouse click has no effect.
Example : in Writer, selecting a stylr, or a font, or a fontsize, or a color, seems to be possible but after clicking on some choice (a style, a font, a size or a color), nothing changes in the document.
Same problem for the table borders, also in Calc.
Steps to Reproduce:
1. Launch LO 7.2.1 under Linux + KDE
2. Open Writer
3. Try selecting a style with the mouse (or trackpad) from the format toolbar
4. Did the style change really ?
None, of course !
Choices obeyed and document accordingly changed.
User Profile Reset: No
OpenGL enabled: Yes
Somewhat similar to
Looks like bug 144037 (problem with controls in vcl:kf5 in KDE)
*** This bug has been marked as a duplicate of bug 144037 ***