Put mana spreader in front of import bus, and mana will keeps increasing.
I don't know if it is a bug.

Fluix mana pool CAN'T actually save mana and use it, but it is able to use spark to transfer mana

forge 40.1.76
appmek 1.2.2
appbot [FORGE]1.02-alpha
AE11.6.6

I can't reproduce (anymore?). Please open another issue if you somehow get this again