@DaveRespawnAcctI just finished Kashykk after I got the staff lightsaber and fought the ninth sister when the issue happened again where I was unable to select/interact with Dathomir despite seeing it on the ships holo table.
I could see Dathomir early on after doing the 1st Bogano story where at the end it gave you the choice between Dathomir or Zeffo for your next planet. I was only able to select/interact with Zeffo. I could see Dathomir on the holo table but when I tried to pick it but could not interact with it.
I did not do the Dathomir wall scan on Bogano (didn't know about it until it was discovered on this thread as a "secret" requirement to interact/select Dathomir. It was only after scanning the wall that I was able to travel to Dathomir after Kashyyyk. I'm assuming if I did this before then I would have been able to pick Dathomir instead of Zeffo.
I already progressed through Dathomir and llum so I can't produce a screenshot or a video. If you look at my first screenshot you can see my mouse cursor over Dathomir but it doesn't have the 4 arrows around the planet as the others do. After the Dathomir wall scan on Bogano I haven't had issues with not being able to interact with Dathomir or it disappearing from the holotable after going to planet view and back to galaxy view.
I also did not have issues with the order 66 cutscene and getting stuck.
I think the main issue is that you expect us players to scan this obscure wall on another planet to be able to go to another planet despite already unlocking it via the story. This should not be a requirement. Every other progression thing or flashback is obvious and hard to miss as you do each planet (assuming they don't bug out like others on here). So for people like me who missed scanning this wall, I wandered around for a few hours and almost quit the game when I was unable to progress in the story.
PC Stats are: 1080p resolution, Intel 5960x, 32 GB of RAM, Nvidia Titan X (Maxwell), 512 GB Sata SSD, WIndows 10 Pro (x64)