I added a video capture of one instance of the issue. Pardon the poor editing, it took a bit of trimming to make it fit.
The portal generated in the Nether in this clip was not checked or readjusted to line up in the Overworld since none of the portals are linking up properly anyway, but you can see it takes the player to the world spawn, not even another portal, and displays the "you have been teleported to..." message.
Leaving the troubling Overworld portal broken and going through a portal in the Nether just creates a new portal near the now broken Overworld portal. It seems as if the coordinates are not multiplying correctly when going from the Nether to the Overworld, but ARE dividing properly when going from the Overworld to the Nether.
Downloading the Realm to a single player world save does not fix the issue. :/
My realm uses the beta texture pack, but I also experience it on my singleplayer worlds without resource packs. I also experience the lag/performance issues in the menus when I'm not even in a game.
Experiencing this in 1.8.1 on Xbox One S.
Issue also affects 1.8.1, Xbox One S.
I'm also having these issues on Xbox One S.
I'm having the same issues for Minecraft Bedrock 1.8.1 on Xbox One S.
Still present in 1.12.0