I am using Premiere Pro CC 2017.0.2 v11.0 on an iMac using OSX El Capitan. This has happened to me once before on a different computer using a similar version of Premiere. I have a picture on my sequence and am scaling up from 48 to 53. At the 50 mark, the picture abruptly increases in size. The number scale does not change, and if I pause the video, the image reverts to the size it should be at. Upon exporting, this problem did not show, but I am curious why this happens and what to do if it does show up in a future export. Attached is a screen grab of the project. Anyone else ever experience this?