End gateway

When you defeat the Ender Dragon it leaves two portals. One to return to the overworld and one too go to the outer islands. This bug is about the end gateway. If you break the bedrock and summon the wither (Just via 4 soulsand and 3 wither skulls, no commands) the portal will break and it will drop itself. I dont think it should drop itself or even can be exploded. Please fix this