Well it is about 4 months now, so do you think that it might have done the ‘snap’ maybe whilst riding?
As I said, it hasn’t dropped the chain, but it does feel loose compared to the Shimano ones on my other bikes and it is bloody noisy.
It’s VERY unlikely that it’s still stuck in the locked position as the chain would be hanging very loose in that scenario.
I did find that my b-limit screw needed adjustment after my first couple of rides as it was allowing the chain round the top jockey wheel to rub on the edge of the frame which stopped the clutch from springing into it’s fully tensions position…