Corpse Entities Cannot Pass Through Nether Portals and Incorrectly Contribute to Global Mob Cap in Bedrock Edition

Description:
In Bedrock Edition, corpse entities (the visual remains of dead mobs) cannot be transported through Nether portals, unlike their behavior with End portals and End Gateway portals. Additionally, the global mob cap of 200 is shared across all three dimensions, and corpse entities continue to count against this limit until they despawn. This combination causes reduced mob spawning rates and impacts gameplay efficiency.

How to Reproduce:

1. Execute the command /summon chicken ~1.5 ~-0.5 ~-1.5 to spawn a chicken positioned to simultaneously contact both lava and an active Nether portal

2. Observe the chicken die from lava damage (4 points) during the portal's 3-game-tick teleportation delay

3. Check whether the chicken corpse is transported through the Nether portal

Observed Result:

• Live chickens are successfully teleported through the Nether portal

• Chicken corpses remain in the Overworld and do not pass through the portal

• Corpses continue to occupy the global mob cap until they naturally despawn

• This behavior differs from End portals and End Gateways, which successfully transport corpse entities

Expected Result:

• Corpse entities should be transportable through Nether portals, consistent with behavior observed in End portals and End Gateways

• Corpses should either not count against the global mob cap, or the mob cap should be separated by dimension

• The Nether portal should remove corpses from the Overworld dimension when they pass through

Additional Impact:
The inability to clear corpses through Nether portals directly affects mob farm efficiency in Bedrock Edition. Since corpses occupy the shared 200-mob cap and cannot be dimensionally relocated, they reduce available spawning slots and degrade game performance in intensive farming setups.