Seems this bug has reared its ugly head again: Applying a remote dynamite, dropping it and pressing the red button on an RC controller does not cause it to explode. As an observation, an active remote bomb has a charge value of 1, after pressing the red button, the value changes to 0 however it never actually explodes on its own. Picking up the 0 charge active remote dynamite and applying it will cause it to immediately explode in your hands.
The same is true for RC car mounted explosives.