MCMT Version: 0.22.87 with compatibility settings.
Modpack: All the Mods 6 1.8.5

We discovered a weird behavior change of the Draconic Evolution Reactor:

Without MCMT:
https://user-images.githubusercontent.com/6189957/137117110-76d57b4e-387f-4aad-8485-db1285b8b581.mp4

With MCMT:
https://user-images.githubusercontent.com/6189957/137116838-723e4ad9-8bae-48d6-bb5a-d3cbb79ca303.mp4

As seen in the videos, the reactor gets completely unstable.