Something Strange (Weird Gate)...
Just finished a Jelly King run and the home (to Haven) elevator on the level after him had a strange dark blue down arrow (looked like an upside down tape eject symbol) - and said it cost 10 CE (which was also strange because of it power weekend). I quickly jumped on it thinking it was something special but it just brought me back to Haven. Unfortunately I wasn't in the right mind to take a picture.
Anyone else ever seen this?

I think this happens when the gates change out of rotation.
That did just happen
Yep, the gates make a funny sound and go dark when they rotate out.
Indeed, this exact same thing happened to me at the Core when I completed the leftmost gate after gate-rotation. Blue arrow and 10 energy cost marker, but it functioned as normal, taking me back up to Haven for free.
Fool. Your Crystal Energy had to be fueled by dancing energy to make it work.
On a serious note, this is new to me.