Are the tire pressures high enough? It sounds like your VX has been in the shop for awhile, so maybe the tires have lost a little pressure during that month of sitting, they start to get temporarily flat spotted after sitting for awhile, but smooth out once they're driven on and heated up?

The General tires I now have on my car have done that even they were new, and that would happen even after only being parked overnight. The pressures were always good, but it would take five minutes of driving for them to smooth out again.

I take it this wasn't happening before the VX went into the shop for the current repairs?