I understand this might not be the answer you're looking for, but I strongly encourage you to consider dropping AD binding and mobile AD accounts in favor of local accounts and using something like NoMAD to handle the password synchronization. I had gotten to a point where the amount of times AD binding failed or caused login issues was just maddening. I'm done with it. It might be considered "mature" on the macOS, but it's still buggy as heck and not worth the trouble. And even if/when Apple fixes it, expect it to break again in some other way (or same way even) on another OS release. You will be playing this waiting game with Apple constantly to get these issues addressed.
Again, probably not what you were looking for, but then, no-one here is likely to know when Apple will address any known issues. Plus, you're talking about High Sierra, and Apple is on to Mojave at this point. Don't hold your breath on them addressing it in 10.13.x.
