Using an End Gateway in the main End island teleports me back to the End Portal

Throwing a pearl into an End Gateway should teleport me to the End islands but instead it teleports me back to the End Portal.

• The first recording is from June 6th, 2021 (the day I noticed this bug for the first time).
• The second recording is from November 3rd, 2021 (the day I posted this report).

Both recordings were made in the same world.
Seed: -1504827799 (generated in 1.16)