Difference between 3 hour and 1 hour preview
There is a difference in the weather forecast between the 3 and the 1 hour preview. As you can see on the pictures, Windy shows rain for the 3 hour periods 8-11 and 11-2, but no rain in the 1 hour periods from 8 am to 2 pm.
This is because the rain amounts below 0.1mm are not shown
See further explanation below:
It is not a bug