I noticed the same power loss issue. To test, I set up Induction Furnaces like; .=air -=ins. copper,
......|---IF
..|--BB--IF
..|............
..|...|---IF
LVT--BB--IF
..|.............
..|--BB--IF
......|---IF
LVT was supplied by fully charged MFE delivering 96EU/t.
However, that set up smelted ore faster than I could load it into the furnaces, even with < 100% online.
I did notice one bug worth checking out. When you save/exit and return, the unsmelted ore moves around inside the IF, even to the power provide box.