Description of the issue:

When better biomeblend is installed, the preheaters fan is rendered as mining drills

Before the update in version 5.0.4 the fans rendered fine. This is obviously related to the implementation of the spinning animation.

Versions & Modlist

forge-1.16.5-36.2.22-universal.jar
ImmersiveEngineering-1.16.5-5.0.6-141.jar
betterbiomeblend-1.16.4-1.2.9-forge.jar

Okay, that's actually pretty funny.