I think your asking two separate questions at the same time.
You discuss rain delay and what seems like a timezone issue but then you ask if rain sensor detects the reverse state.
First, based on what you said, there is a timezone issue setting the rain delay. I’ll check it out (this is also causing TechFan to see the wrong day in preview page after a certain hour).
Second, yes the rain sensor clears after rain sensor swells down an resets. Be sure you’ve set the correct method the sensor uses (normally closed vs normally open).