End gateway teleports player to main island instead of outer islands

When I enter one of my gateways, it teleports me to the main island. This bug is similar to MC-139318 on Java Edition except this bug is on Bedrock. The gateway worked a few months before (in 1.15) but now it does not. I don’t know if it was because I didn’t enter it for a long time or if something got changed in the 1.16 update.

If anyone knows how to fix this please tell me.