I'll drop the psi, although I've never had this problem before, van is nearly empty maybe 150kg of junk evenly loaded.
My white van had 50psi.
Reason for tyre pressures ius i always watch the wear and adjust as best as i can to keep it even.
But, I've never had anything like this, it isn't pulling or anything dodgy.
But it feels like play in the wheel where you have to keep leaning left and then right.
The tyres are heavy duty ones tho and not the factory contis so perhaps then having such a broad flat surface is to blame?.
I'll take a picture