This doesn't take into account the C7 issue. The 500 series need to be paired to the c7 with a z-wave stick paired as a secondary controller with no security in order to not destabilize the mesh
You have 4 things connected as s0, I would try to re pair those without if you can (unless they're locks)
One is a lock, the others are on the list to be repaired. That being said everything has been fine with them for some time.
The issue is s0 which tends to be chatty as hell. (why the 500 series 4-in-1's bring down a mesh)