I did this fractal three times last night and got the “cage bug” twice. There is no way to damage or get out of the cages when it happens. Portals, portal guns, and any kind of movement action (jump back, knockback, etc) dont work.
This was extremely frustrating because I got it as my second fractal the first time and third the next two (thank goodness it worked the last time) so it took me eight fractals to complete a level.
That is totally unacceptable so I agree that it should be removed from the rotation until it is fixed.