Incorrect teleportation to end dimension when pushed into the end portal by a piston

When a piston pushes the player into an active end portal they get teleported into the end dimension while keeping their overworld coordinates instead of always spawning on the main island. This may cause them to enter the outer end islands early or just fall into the void. 

See attached video for a showcase of this bug in Minecraft version 1.17.1 and 1.18 Pre-release 8.