I can confirm that this bug is most definitely still alive and well in 1.106. I have a setup of 117 solar panels, which I then connected to an MFE... And the cables promptly fried. I then proceeded to take electrocution damage for several minutes after, and the MFE is even now charging even though it is not connected to any power source at all. Furthermore, removing it and replacing it does no good whatsoever, it simply continues to charge. Have I just completely wasted the last week gathering the materials for these solar panels due to completely bugged wiring?
(Oh in case anyone's wondering, no, the output face of the MFE was not facing or connected to the tin cables in any way; I'm not that silly.)