wolflop Only as a tip to test. I have found, if I edit DVDfab generated UHDs again with CloneBD, that these were then playable. Maybe this will help you. Im using an UB900 Panasonic.
Mona Hi guys, The playback problem is fixed, please update to DVDFab 10.0.8.9 to try again: https://forum.dvdfab.cn/forum/software-support-english/dvdfab-x64/352521-new-dvdfab-x64-10-0-8-9-is-out-april-12-2018Regards,Mona