My guess is that it has something to do with my YouTube Premium subscription never triggering Google’s anti-adblock software, which means the app was never flagged for a soft lock.

I use Vanced for the SponsorBlock, increased default play speed, background payback, and other assorted tweaks rather than for the ad blocking, but blocking ads will definitely jump to the top of my list if my “Google Play Family” ever stops paying for premium. At which point I guess I’ll migrate to GrayJay?