After playing for a while, unloaded chunks do not fully load when I go to them, they are invisible and the chunks next to the invisible chunks stop updating - as seen in a screenshot attatched, the redstone signal won't travel through the chunk borders into the dead chunks next to the invisible chunks. Chunks already loaded work as normal when this happens, except the ones directly next to invisible chunks.

This is a single player survival world, which I think is 2 years old now, world size 420.5mb. 

Relogging fixes the issue, but then it happens again after a while. The first time it happened in my world was on 24/11/21

I'm unsure what is causing this bug but I can confirm it's not returning from the nether as I have not been through any nether portals today and still experienced this issue