How much heat is generated by a ceiling fan's remote control receiver?
How much heat is generated by a ceiling fan's remote control receiver?

It depends on what your remote does. Some remotes have a very low power dissipation but others with both speed and light dimming can get quite hot.
I would never use bubble wrap on an electronic circuit.
I might make a plastic umbrella above it. If water gets in the fan or lighting circuits this can be what caused the damage not only to the module itself.
I would remove the bubble wrap.