Ok, here's the Link to a Posting where you see two sorts of downvotet comments, the second one is what I've talking about.

https://steemit.com/deutsch/@meins0815/wie-ernst-isses-denn

See the lowest comments under "beerlover". The first one is a downvotet comment which a Bot made and there's to read "reveal comment", so you just to have to click there and the comment is visible again as you've said.

By the comment below this is to read "Comments were hidden due to low ratings." I tried to click the button on the right where stands SHOW, but the comment was invisible furthermore, just the Button changed his inscription from SHOW to HIDE, that's all and that's what I've meant.