One issue I noticed with this is of course the chunks are loaded at the time but they stay loaded for a long time in fact I have a feeling they load till their killed off or some how their memory is wiped. I checked my map today and 100's miles away from our bases any any source of man made changes besides me running past it including no pollution even close to the area's had chunks loaded.
Easy way to repeat is just go for a long jog and come back to your base and check the chunks 12 hours later.
This example is maybe 12 hours later RL time:
You can see the red path where I run even the bitters trains that I run past when chasing me.
