I'm running the latest version of Project Ozone Lite. Was trying to do a big expansion on my ME System's processors, and pulled out my unbreakable wand to place a bunch of co-processing units at once, but it broke the blocks it was anchored to rather than placing new ones. This occurred whether the processor multiblock was complete or incomplete at the time I attempted using the wand.

I mean, it's not like it's THAT much more work to build them manually, but it's a weird interaction that you should probably know about.