So I've found the actual bug which is totally my mistake sorry there, Kick doesn't consume electrocharges at LV20 when used for kick, it consumes it at 21 Electrocharges for Kick specifically (movement still works normally).
In my tests I found it very consistently by accidentally getting 1 electrocharge at 20 electrocharges with some random lightning damage inflicted by the kick itself.
In my tests I found it very consistently by accidentally getting 1 electrocharge at 20 electrocharges with some random lightning damage inflicted by the kick itself.