I've been practicing SSG (564030617). I put a nether portal in the end portal room, and when I walk through, before I've managed to even get control of my character on the Nether side, 6-ish piglins / brutes manage to cross into the overworld.

Is this something that can be easily prevented in a run where the nether portal lands in a bastion? Is it a matter of moving the portal? I'm on a slow-ish computer, could that be the culprit?