I can't reproduce this on my end, but I'm noticing weird git diffs where the data of the included files get their "CopyToMask" set to "-1", which looks like it could be the issue. I'll upload the latest file I exported (in case whatever happened didn't happen because it was fixed?), if that fails I've also uploaded the level sources separately ("Level source files"), please try manually re-importing them as included files if they still don't load properly.