Snowballs teleport through Nether portal and stack under portal frame in the Nether (v1.21.90 Bedrock)

Steps to reproduce:

1. Launch Minecraft for Windows (Bedrock), version 1.21.90 "Chase the Sky".

2. Build and activate a Nether portal.

3. Throw snowballs at the portal from various angles.

4. Enter the Nether to observe where the snowballs go.

Expected result:
Snowballs either disappear or land on the ground normally after being thrown through the portal.

Actual result:
Some snowballs teleport through the portal and are found under the Nether portal frame, aligned exactly with the bottom purple line of the portal. This happens especially when thrown at a certain angle.