Hi,
I found some crashes:

1. Server security Terminal
   https://paste.dimdev.org/kolijucule.mccrash

2. Server Core:
   https://paste.dimdev.org/nejilamitu.mccrash
   (I placed both blocks on the ground -> world is corrupted)

MC: 1.12.2
Forge: 2815
AE: Rv6-Stable 6
AI: 8.0.5
RFAPI: 2.1.0.6

(the following stuff should be known)

(all 4 logic blocks)

Ps: I saw in the curse comments, that someone had crashes too, I hope these 2 kinds of crash are not the same.

Thank you for this report, this crash will be fixed in new version. If you will try to use energy import/export bus, and it will give crash, don't create new issue in tracker, because all the parts(buses) are not working yet in 1.12.2 version(except for interface), and these buses will probably give crash.

kk