The Factory Block Placer is unable to place any blocks inside of a CompactMachines machine and drops them instead.
The server does not spit out any errors on the console.

This setup works perfectly fine in the overworld:

But it breaks in the CompactMachine dimension:

Versions

Forge: 1.16.5-36.0.10
Engineer's Decor: 1.16.4-1.1.7
CompactMachines: compactmachines-4.0.0-alpha.6.jar

Hi, risked a quick peek today and edited a replacement-check, fix is scheduled for v1.16.4-1.1.8-b2. Thanks for reaching out!

Alright, fix is uploaded (engineersdecor-1.16.4-1.1.8-b2), cheers!

Thanks for the heads-up