I have set up a portal to Nasharil, in my base. Directly in front of it (on the other side) is a chiseled block, designed to push you towards the 1 block exit. however, this creates a consistent way to glitch a portal. or rather, the player character going through the portal.
I repeated this trick 3 times, and also got @Smooth-Slick to confirm with me. This is indeed something that is repeatable and easy to do.
Sometimes it spits me out to the side, turned 90 degrees to my left. this didn’t happen often. (facing the doorway is a 90 degree left trun)
Most of the other times, it would spit me out directly on top of the building i made to protect my portal.
I believe this is because going through the portal i hit a block, go through the block, and get shot upwards. but i could be completely wrong. certain people may ask for permission and location of the portal to test. just shoot me a pm on the forums and i’ll gladly let you in to test it out.