I dont know if its just me, and my perception of the car, or if there is actually something going on?

When I drive my '17 GTS at speeds over ~35 mph mostly up to 80mph or so, I feel a slight shimmy or swaying in the steering.
Its very subtle, but it almost as if it slightly sways from the intended direction, veering every so slighyly back and forth left to right depending on the road.

I'm started to focus on it incessantly

I swear it wasnt present a few months ago. Car has roughly 8500 miles on it.

Anyone else experienced this? Or is this common?
Could this be an alignment or balancing issue?
Wheel/ tire issue?

I did take the wheels off myself to decontaminate and apply a ceramic coating to them awhile back. But the issues weren't present immediately after wheels reinstalled.
I Installed back according to porsche manual. Correct torque on centerlock, porsche specific silver paste, etc.

All thoughts greatly appreciated.

 

 

Tire tread appears fine. Haven't measured just yet.

However, the tire pressure was definitely a little off.
Appears there was a little discrepancy between a digital tire pressure gauge and what the Porsche sensors were reading.

I took some time to fine tune the pressures to make them exact. 33 front / 36 rear and this definitely improved the overall feel.

Hoping that is all it is.