[Autumn]

Currently when you are knocked down and get back up, your hotbar stops working when it becomes your turn again. This is restored upon using a skill in the skill menu manually but can get annoying in encounters in PvE against enemies that spam knockdown such as Gold Beetles or Ice Giants.

[The Alpha Bat]

Just to add, you can also fix the hotbar by switching hotbar tabs up or down and then back again.
But yes, very minor inconvenience but an inconvenience nonetheless.