Sometimes this relates to some fine tuning by looking at your Derivative Sensor. You may need to increase it a bit. Go back to the history and see what happened then fine tune it. When you look at the history add all three entities. Fan, Derivative Sensor and humidity sensor so you can get a real understanding what is happening. You could be using Maximum Humidity and that is why it triggered to. I have no false triggers but I did have to fine tune it a bit so just a heads up.
Create a time helper or a schedule helper and add it into the bypass. This will keep the automation functioning correctly. You will probably use bypass option 2.
If you need more control over your lights, use my 
Sensor Light blueprint for your lighting automation.
If you are using the automation link to keep the light ON (for example, because the motion sensor can’t detect you while you’re in the shower), simply add that automation link toggle helper into Bypass Option 3 in the Sensor Light blueprint.
This way:
- If the lights are OFF because it is daytime, they will stay OFF.
- If the lights are ON because it is nighttime, they will stay ON as expected.
How and when your lights turn ON is fully handled inside the Sensor Light blueprint. It includes many flexible options, and this is the exact setup I personally use… so I know it works reliably, as it was originally developed for this purpose. In the FAQ I show you a full set up I have.
Blacky 