Scenario: Atomic Reconstructor set to Pulse; Wooden pressure plate in front of it; Lens of Color installed; dropped Redstone Block on pressure plate (by accident, forgot to remove the Lens of Color first); server crashed

Crash Report: https://pastebin.com/fCQJZ8LT
FYI: The block in the location that caused the crash according to the crash report was the Atomic Reconstructor