Karolina Dean is locked in a room made of plywood by Frank and told that her powers would be useless in helping her escape because there was no electrical components in the room. This is the first time in the entire series that her powers relied on there being electricity. In fact she has blasted people with her powers outside in the wide open plenty of times.
Also Niko seems surprised that Karolina was flying at the crater, when she's been levitating in front of them several times, and even used it to help her friends enter the hole at the construction site and get out of that hole.