That was my very thought. I have always just dumped rather than dip the film into the tank. Never with any problems;however, .........
I will try another roll and dip rather than pour, and that will element that variable. If it continues i may need to think about Lee's suggestion.
Have recently got a trial pack of Pryocat-hd, but didn't want to switch developers in the middle of a run. Have 16 more rolls to develop from the same shoot and wanted to finish with the same developer.