Hi, I have been using KODI for a few years now, and just switched to Krypton. Went straight from Helix, but no problems 
However, two days ago a strange new behaviour appeared: on certain TV Shows the disc menu is not visible, the screen is black, the sound is there, and the navigation keys are responsive, but I am not able to see what is going on on the screen. (I have a Windows 7 pc, and all my content are DVDs ripped with AnyDVD in their original file/folder format). This only applies to some of my TV Shows, but it never happened before. I made no hardware or software changes to the PC before this happened, but I did try to implement a new learning remote, so I may have sent some unknown command to KODI? Any insights will be greatly appreciated!
Best
Chris