IDK about my Garrison “going missing”, but the WoD Garrisons (Alliance ones in Lunarfall, in particular) have been glitchy, for awhile, now, years even. Exiting/Entering (on the ground) of your Level 1 Garrison, from the north end constantly DCs you. Logging back in just DCs you, again. Using the character stuck option fixes it, sometimes, but I have continued to DC even using the character stuck option.
Entering (haven’t had it happen, when I exit, yet, only entering) my Level 1 or 2 Garrison (by ground), I freeze and DC. Re-enter just to DC. Use Character stuck option and hope for the best.
The character stuck option can only be used once every four hours. There’s a timer/limit on it. You can unstuck a character you’re not even playing.
I’d continue to post about all of the WoD Garrison issues in the Bug forums. With as much details as you can. Maybe one day, the WoD Garrisons will be fixed.
My “workaround” is “flying in/out” via FPs and haven’t had an issue, yet. I fear using the ground level of the WoD Garrison area. I get nothing but problems.
Bug forums:
My Bug Post about WoD Garrison issues (1 year ago):
It’s super slow. Gotta give it like 3 minutes for the appropriate character to show up. Happened to me, a year ago, as well: