Indesign CC 2015: Image display issues

Hi. Recently updated to Indesign CC 2015 on OSX 10.10.3, Late 2012 iMac.

Images that are placed, especially larger images, will become very pixelated and low res after a few minutes of a project being open. File exports correctly and images bounce in correct resolution. Changing display modes back and forth does nothing to help. This behavior did not exist in ID CC2014.

I am working in high-res display mode and the images will look worse than they do in "typical display" mode. If I re-link the image, it will usually go back to looking normal, but then after a while, or upon re-opening the project, will go back to being very pixelated.

Have trashed pref and saved data.

At a loss and working on a big project.

Thanks

Nick