Your drain tube could be partially clogged so it isn't dripping out while you drive, but waiting to come out all at once when you're parked and level. Not sure, but I would poke at the drain tube to check it for issues.

OMG you've broken the code. Every springtime it's AC drains and stuck heat actuators. Every November it's 4WD systems and front axle actuators. The erratic idle throttle body problem seems to have a 12-month growing season.^Seems to be a lot of that going around^
:crackup: