Issue with chunks during the loading process

Opened my long term Minecraft world and noticed an issue when reloading previously loaded chunks.
Instead of the blue sky/void colour that normally appears when chunks are loading, I was seeing chunks of land and water that never existed to begin with.

This issue may be hard to reproduce since I'm playing a world that was originally created in MCPE 0.5.0 Alpha, later converted to an infinite world, transferred to MC Bedrock on my computer, uploaded to a Realm in 2020 then uploaded to a second Realm when the original one expired in 2022.

I flew around the entire world to refresh the chunks that were already generated in an effort to save 10+ years of memories from getting corrupted.

I also managed to get some screenshots of this issue, 2 of which were taken from the same position and show the glitched chunk generation and the correct chunks which loaded a few seconds later. The other screenshot shows a large cluster of chunks that appear to be part of a hill or mountain behind one of the structures I've built. 

Please get this fixed ASAP, I don't want these "Ghost Chunks" to accidentally get burnt into the world's save file as a result of exiting while these glitched chunks are still loading.