I think it’s OK for this to happen on low spec hardware, but it looks like this bug to me Entire buildings and objects disappear
There’s a place in the beginning of the route Country to Coastal where a big part of the vegetation pops in and out various times, I posted screenshots here Game Update 1.34 [April 2023] - #161 by oldnapalm
I’ve seen it happening on various machines, including this one which I think is powerful enough to not having these issues
