When working with Tif files and making changes in development module the screen refreshes and re loads the image after every change. I found a work around by unchecking "Automatically write changes into XMP" withing Catalog Settings. I have uncheck this, restarted LR and re-checked it and the problem continues. Would like to leave this option checked but will have to leave unchecked until I have a resolve. Please help, This did not happen with the prior version.
Same problem for me. Win 7,8gb ram, no gpu (disabled)
Update: Seems to be with TIF files that I work with through Nik Colletions software through LR, after working on the photo and it creates the edited TIF back in LR the re loading after every edit occurs. I reached out to Nik Collections support, their response was this is an Adobe issue.
A number of people have reported these symptoms. Please add your vote and lots of details to this bug report in the official Adobe feedback forum: BUG: LightRoom 6 TIFF file reloads after each Develop edit, potential data loss