LibreOffice and mouse selection

Installed the following version on Debian 11 ‘bullseye’:
Version: / LibreOffice Community
Build ID: 87b77fad49947c1441b67c559c339af8f3517e22
CPU threads: 4; OS: Linux 5.10; UI render: default; VCL: kf5 (cairo+xcb)
Locale: en-CA (en_CA.UTF-8); UI: en-US

This version looks have flaws with mouse support. For instance, unable to change fore- and background colors in Calc just with a mouse click, a color left unchanged. Another example - unable to change a selected text color with another one selected from a drop-down list by mouse. Only keyboard moving with following ‘Enter’ are working for that.

Hi. We are users here so cannot help to fix bugs.
We are encouraged to report bugs through the appropriate channel, please see How to report bugs. Cheers, Al