Shortcut B "Add" to Target collection switched to "Add and Next" but Caps Lock is off

Since I upgraded to LR Classic 8.3.1 the Shortcut B works as B plus Caps Lock on. But keyboard Caps Lock is definetly off. I never use the "next image" functionallity.

To use the old B action, I have to switch Caps lock on, which is not my goal. Rebooting and a reinstall of LR with keeping the settings didn't help.

Thanks for your tipps!

Andreas