Most noticable for me when it happens: If a dare to pick a Perk while i respawn, my HUD and Crosshair disappears, either for minutes or until i do a weird combination of ESC, F1 and go to Menu.
I run default Bindings, and also Reset the Bindings just to be sure after the 3rd occurance.
There is something weird going on there.
GL & HF Gamerz !