Thank you for reporting this! The issue is that I don't recheck after mining of a voxel if the state depending on the voxel is still valid. A similar issue is that you can mine the voxel you are gripping during climbing and the grip will still be there even when the voxel is gone. I will try to fix this in an upcoming update; but probably not in the next one as this will require some change in my logic on how I create/remove these things.