When I attack him and he gets to like 30 percent health he teleports to an inaccessible place. I tried killing the dragon whose name starts with an R but Miraak still doesn't come back. I looked up a tutorial on how to kill him and what's different (other than they can actually kill him -.-) is that Miraak starts a dialogue with them. For me, he says something like "we should welcome our new guest" and then when i go over to him he just stands there and if I press E he says "Now is not the time to talk" and then he attacks me. Any help?
Edit: Just to clarify, this is not the normal glitch most people experience where he's unkillable in the center. Like, he literally disappears for me and doesn't come back.