Same here EX1 56-448916 build. The hatches will either be burrowed in the air or be cycling between burry and wrangled on the ground or in the air. For me it only reproduces when the hatch is wrangled. Hatches walking around normally seem to be fine and do not behave erratically. Also dupes have wrangled hatches in solid stone, usually one tile deep and the hatch does not "pop out" of the stone. I have not dug these up yet to determine if the wrangled hatch is there still.