I'm currently having a mod in development, and i built a little structure for it with a modded blocks. I exported it with MCEdit 2.0.0-beta12 into .schematic file, imported it into MCreator, found it and it was all made of Gold Ore and Oak Leaves blocks. This is not the problem with MCEdit - i imported the same .schematic file in the world and everything was fine. I also attached a few screenshots with that structure - the original, the copy, and the generated structure.
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