Can’t seem to RW or FF OR skip at all

I have a RaspPi 3 based Kodi17.1 player that gets its files from GB network from a Drobo5N2. Even on a SD rip from a DVD I can’t FF at more than 2x. None of the skipping seems to work either. Trying to do so just causes the playback to jump back to the beginning. Arg! The files are moving h.265.

Any ideas or suggestions? This is extremely frustrating…