Can't weapon swap in COF p1
Its because of the cutscene. Just press H, click the weapon switch icon and it goes back to normal.
As Turin said it is because your weapon swap is still on cooldown when the cutscene starts. Happens for all cutscenes not just CoF P1.
It can also happen without a cutscene.
One of those really annoying bugs that’s been with us since launch. At least swapping in hero panel unbugs it.