Vray 5 IPR render region wipes out previous rendered image

[Moriah]

This didn't happen before in old VFB. Now everytime i do a region render with IPR, it wipes out the out of region image. This is counter productive, because usually i like to have the old render to compare (and i would assume most people did this too).

Could this be reverted, please?

[hermit.crab]

It should work in the same manner as in previous versions. Could you share a video demonstrating the issue? A simple scene would definitely be of use as well.