I have LR6 and just for the last two days, when I click a slider to edit a pic, the photo goes to a blue screen until I let off of the slider. I have uninstalled and reinstalled and even restored my computer. Basically I can't see the photo while I edit it but the edits work and it shows them when I let off. I am confused. I can't find anything regarding this online anywhere
Please uncheck the use of Graphic processor under Lightroom preferences and check if it helps.
Do restart Lightroom once you made changes to its preferences.
so simple!!! Im not even sure how that happened but you are a lifesaver!!!