I have replaced a ton of these chain adjusters at my shop and can tell you I have been worked over more times than I can count by aftermarket chain adjusters. I have installed probably 5 that I can think of that had 1 problem or another right off the bat and had to be replaced and several more that had problems a few months down the road. For awhile I would only install factory adjusters because I had no confidence in any aftermarket units, but about a year ago I started using Hudson brand adjusters (K revision) (from north side imports) and haven't had any problems with them since. What is your timing showing in measure block 91 when this is happening? A quick test you can do is hit the adjuster solenoid with a power probe while watching MVB 91 timing should advance to 22° relatively fast and then back down to 0° when power is let off. IF your chain adjuster is getting stuck this is a great way to catch it happening. Also some times when faults are stored for timing MVB 91 will not show an accurate reading until you clear the codes. If your old adjuster was working fine I would defiantly throw that back in and give it a try.

As for having a problem with you cam sensor I highly doubt anything is wrong with it. They tend to be super reliable unless you physically damage the sensor.