Sort of. In that everyone is experiencing this problem with the instance servers sometimes. You get into a duty, get a 90006 error, then get continuous 90002 errors when trying to log back in, until the game finally closes the instance and kicks your character(s) back out to wherever you were before.

For the solo instances, it's usually fine to keep trying, as they don't take too long to close out without you, the only person in them. It's not fun, but it's a bit better than waiting in a 45-minute dungeon queue to have the same thing happen, and then being locked out for 15 minutes.