Never mind, there is a bug in the DHT22 library code. PR on it's way :)

One more thing:
Setting the watches again, numbering starts from 1 again. And both the button and CCS811 works just fine. For a minute or two. Kind of random.

And all watches disappear at the same time. Stops responding to button presses, and no more data thru CCS811 interrupts.

E.getErrorFlags returns empty array :/