This issue is happening once more with the latest build: engineersdecor-1.16.4-1.1.13-b2.jar
Reference #162 for the previous occurrence

items placed by Building Gadgets are placed with waterlog set to true Items i specifically noticed ate windows, roof, all the lights and the beams as well. building Gadgets is looking at a workaround but may be due to the default state of the block placed reference this issue: Direwolf20-MC/BuildingGadgets/issues/579

so right now if i try to paste a building it is literally crying: https://imgur.com/gallery/2eRS1nf

correction the schematic must have been copied with an old version of Engineers decor loaded