When a universal cable is connected to AE2 blocks that accept power, it seems to cause AE2 to lock up. II'm running this on a server, so I have to quit the process, and there is no crash logged in the console from the issue. However, if a redstone energy cell from Thermal Expansion is connected to the block, there is no crash; hence why I assume it's Mekanism that's causing the issue.

Version of AE2: rv1 alpha 38
Version of Mekanism 7.0.0.84

Let me know if you need any more information.

-MastaC

Will be fixed next release.