Any progress on this? I have this problem aswell, and after dropping c4 my weapon is unusable for a while. It gets really annoying tbh to drop c4 everytime when getting into a vehicle. Atm only solution is to switch from C$ to aynthing else, this will rpevent this from happening.
Hey StukaRT,
As of the moment, this issue is being investigated by the dev team. Hope to have an update to report regarding this occurrence soon. In the meantime, may I ask if you are using an Xbox One controller? I have been informed that this often times will play a role in the bug taking effect.