Zombies Riding Zombie Horses Cannot Travel Through Nether Portals

In Bedrock Edition, when a zombie is riding a zombie horse, the entire entity is unable to pass through Nether portals. This behavior differs from Java Edition, where mounted creatures (including zombie jockeys) can successfully use Nether portals. This inconsistency breaks expected cross-dimensional mobility for mounted hostile mobs.

How to Reproduce:

1. Summon a zombie riding a zombie horse using commands or natural spawning

2. Lead or push the mounted zombie toward an active Nether portal

3. Observe the entity's interaction with the portal

Observed Result:

• The zombie jockey fails to teleport through the portal

• The entity either stops at the portal or becomes stuck without transferring dimensions

Expected Result:

• Mounted mobs like zombie jockeys should successfully pass through Nether portals to match Java Edition. Both rider and mount should teleport together to the corresponding dimension