So, when I calculated my maps spawn chunks I was getting a 10 chunks range from the spawn location in each direction rather than the 6 mentioned in many videos and sources in Minecraft.
I used a light sensor, hopper and chest to test redstone signals. After a short amount of night anywhere else when I return to the spawn during the day through a nether portal any chests that had items moved to them were getting a redstone signal at night and thus in the spawn chunks.
I was playing Minecraft on online servers and I installed some modpacks and started playing around with that. I came across huge Bamboo farm and near it there was a nether portal. Naturally I went it in…
Turns out that was really bad idea, as soon as I came in I saw a bunch of mad pigmans which started attacking me. I was unable to escape even with /back command so I tried to fight them off, but there were just too many.
After dying I was thinking, this would have been a lot easier if I only store my stuff in chest before going in random nether portals – so that’s how I learned that. Sad day.