Describe the bug
Since AE2 v0.53.7 FE P2Ps cant provide energy at the output side when there is an Energy Cube (Mekanism) at the Input side and more than one Output side (Also Batteries, etc. from other mods wont receive energy).
This does not happen when an Energy Cell, Battery, Capacitor Bank, etc. from another mod is used at the input side.
Same happens when a Generator or Energy Cell Multiblock (mashine, multiblock from Mekanism) is connected at the input side.

To Reproduce

1. Connect 3 P2Ps (one as input and 2 as output)
2. Set an Energy Cube from Mekansim at the Input side
3. Set an empty one at the output sides (or a mashine, doesnt matter)
4. The Output sides will only work when there is only 1 output side. More than one will prevent it from working
   Can also be reproduced by following the steps above with a version above v0.53.5 and then downgrading to v0.53.5.

Expected behavior
FE-P2Ps should be able to pull energy out of an Energy Cube (Mekanism) at the input side and provide it at more than one output side.
Additional context
https://pastebin.com/zr69ykVG

Environment
Tested in Singleplayer

• Minecraft Version: 1.12.2
• AE2 Version: 1.12.2-rv6-stable-7-extended_life-v0.55.19
• Mekanism: 1.12.2-9.8.3.390
• Forge Version: 1.12.2-14.23.5.2860

@PrototypeTrousers pls fix this if possible