Works A-Ok on my MACBook 12.5.1, LrC 11.5
A possibility, corrupt preference file.
The preference file can get corrupted leading to buggy behavior. A corrupt preference file will survive uninstalls, updates, and upgrades. By renaming or moving or deleting the preference file you create a situation where LrC will recreate a fresh new one upon startup of LrC. Be aware various settings will revert to defaults.