My bees started sealing their entryway holes about 2 weeks ago. They left just enough space to enter and exit. Two days ago, the holes were completely sealed, with no other way of them exiting or entering. I punched out a hole in one of the entries yesterday and by evening it was completely sealed again. What do you all think is happening? They are working inside and only have 9 combs since May 26th. Drought and no rain?