Another Warp Stabilizer issue with Premiere Pro CC 2014

I've been doing the trial for Premiere Pro to see what kind of features it offers. The warp stabilization is truly impressive. However, in the last day or so it has experienced some real issues. Once it is done stabilizing, the video is cropped down to a tiny image in the top-left corner. I don't have any unusual settings that would make it do this. Turning stabilization off restores the full image.

Interestingly, this occurs with footage from a GoPro and another action cam, but there are no issues with Sony camcorder video.

I don't know why it started doing this, but I did find a workaround. If I add another video effect below it, the full video returns with the stabilization. If I move that effect above Warp Stabilization, it's back to the tiny image.

Anything obvious I'm doing wrong here? There are some things I love about this software, but this has been very frustrating. Thanks.