Failing Variocam Actuator?

[986lp]

This regards a 2002 Boxster S with 105,000 miles. I purchased the car at ~101,000 miles and at that time I replaced the IMSB, Variocam pads, and the three chain tensioners. Cam deviations now sit at -2.39 for Bank 1 and 0.64 for Bank 2. The idle is still a little rough. I chased down all vacuum leaks and fuel trims seem ok: Bank 1 FRA 1.02% RKAT -0.28 Bank 2 FRA 1.02% RKAT -0.28.

I did notice something odd in the running data though, the "Actual angle for camshaft" reading for Bank 1 seems to hunt or oscillate.

What could be causing this? I've swapped cam sensors on the banks and still same result. Could the Variocam actuator be leaking oil pressure causing its position to flutter like this? It's the same when running the engine at higher RPM and the Variocam switches over. Appreciate everyone's thoughts!