When transiting an end gateway via ender pearl, the player is very often (it seems deterministic and dependent on what surrounding blocks are available) placed in a location where they fall through the floor or off an edge. This also happens when throwing an ender pearl into the end fountain (or any end portal in the end); it does not happen when throwing an ender pearl into an end portal in the overworld. This does not happen when simply moving into a portal or gateway, so it's probably related to the ender pearl changes in 24w37a.

To reproduce, just do what I did in vid1080p.mp4. Most likely you will be able to repro with different platform types or no platform at all.