[Autumn]

Rain Trap when disguised by Stealth Trap will not actually show any rain at all when the trap is triggered, but soaked will still apply regardless, simply it is just invisible rain.

To replicate:

Equip Stealth Trap and Rain Trap
Use Rain Trap
Trigger it via Hand Trigger or by an enemy walking over it's radius.

[Neus]

This has been corrected in 2.00.9.