Mobs disappear when I try to send them through nether portals. I've been trying to send striders through a portal and they disappear when they are sent through.
I pushed striders through the portal and they don’t spawn on the other side. I’ve even tried to ride them through and giving them name tags and they still despawn.
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I always find Piglins or Zombies on the wrong side of Nether Portals if there is a player in both the Overworld and Nether near that portal at the same time, so I'm not having this issue. Is it possible that the mob is despawning? You could try giving it a name tag.

I’ve tried to give the strider a name tag and it still despawned when I sent it through the portal. I’ve occasionally seen mobs come out of portals before 1.18, but haven’t seen any since
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