Maybe something just killed you while you were standing in the portal frame
This is most likely the pack's fault
This makes for a really creepy easter egg,
works for me too.
If you have a texture pack on, this may be its fault
Windows 10 1.12.1 issue confirmed, mp4 attached
Works on windows 10 too. Video attached
for some reason, this issue is not present for me
You could make some real weird stuff with this
Have you checked if it's not something with your actual connection first?
e.g. if there's nothing blocking minecraft from connecting to the internet etc. ?
This is probably the fault of something on your side, I went into a creative world, placed some chorus plants, then relogged, and the plants are still there safe & sound. Maybe you can overload chunks in bedrock just like in java? lol, that would be funny.
TL;DR - probably fixed
Maybe if you have any addons/behaviors/resource packs check for errors in those, or maybe try doing a clean reinstall of the game - who knows maybe it would help
This is not telling anybody anything.
Check if it's not your computer's fault before posting here, or just be more specific.
Windows 10 - issue confirmed - 1.12.1