First two coats went on great with typical transition issues but nothing major.
Third did not level itself in a lot of places leaving ridges as though it was applied partially dry. The areas of good leveling and bad leveling are somewhat random within each room. I applied it with a foam T handle with the exact same technique for each pulling from one wall to the next with overlap of about 1/2 of a board.

This is the first time I have used Bona Mega and a water based poly.
I have some possibilities on what caused it and would like feedback from anyone who has had a similar problem.
1. Did I spread it too thin in some areas?
2. Is the third coat a more difficult coat apply because of gassing?
3. What are the impacts of temperature or humidity issues? Area was airconditioned to about 74 F.
4. Is there sometimes a variation between Bona Mega gallons? I had no problems with the 5 gallons used on the first two coats.

Probably a combination of to dry and the air conditioning.