Ever snice the terrain update with experimental in version 1.17.41 the nether has became bugged in new chunks if you have a old world and you have caves and cliffs experimental on and you are in the latest version which is 1.17.41 u will need to go to new unloaded chunks in the nether this happened in my realm i really hope it will be fixed in 1.18 it effects all devices and consoles in minecraft bedrock you can look at the picture below to see what I mean 

Update this is still happening in 1.18.0 it was not fixed in 1.18.0 and is still happening on all version of minecraft bedrock

Update this is only in realms and realm worlds

Update this was just a addon i had installed sorry for wasting your time