I've used PLEX for KODI the official version since it came out. I find it works with these builds sporadically (8.2 and 8.90). Sometimes videos run well and sometimes very poorly. It sometimes resolves with a reboot and sometimes not. Music is fine but video has problems that include very choppy playback, the audio far ahead of the video making them unwatchable. I also use PleXBMC which works great. With 8.90.3 and 4 (the only versions I've run) PLEX (official) starts, but gets stuck on the boot screen - the PLEX image in the center of the screen and three dots flashing in a window in front of the PLEX logo. It does not continue to load anything, just the three dots. I decided to try PleXBMC with 8.90.3 and 4 and it runs great without the PleXBMC Helper addon.
The problems happen with wireless and ethernet connections - Laptop to Abox KODI box. Using SD.
Just wondering if others have found this issue and if they have been able to resolve it.