When creating a nether portal (at least 3x3 size), when one places an end Crystal and subsequently lights the portal, the end crytal will appear on the other side of the portal (from overworld to nether or vice versa). Check video attached.
This does not happen on Minecraft Java Edition.
Minecraft has several different editions, and some features vary from edition to edition. Often this happens when one edition evolves faster than another, and tweaks or balances are made that don't propagate immediately to other editions.
Please report parity issues in the feedback site