Defeated dragon and a while later summoned it to generate a 2nd end gateway. Used 2nd end gateway first to access outer end islands before using 1st end gateway (originally created after defeating dragon for the first time). Attempted to use 1st end gateway which instead teleports me just outside exit portal instead of outer end island. 1st end gateway appears to be acting like an exit gateway instead of access to outer islands.

Seed: -345981973

World was originally generated in 1.16.1.