Coolant leaking from top cap

[Porterave]

As far as now:

No overheating. Average 200F
No air bubbles in the coolant tank
No significant loss of coolant
Good mpg 6.9
Radiator was recently replaced after top left and top right leak at the seam.
No white smoke from exhaust
No coolant in oil that I can see or smell
No excessive moisture in air tank
No coolant smell from air dryer discharge

Does this point me in any direction?