Why Lightroom on IOS is free for me?

I used to pay for Lightroom every time I needed the app,so only paid for one month at a time, but I had noticed I still have the full version of the app, but my subscription is not activated. Is this a bug and I’m getting the full version for free? Last time I paid was over a year ago. and on lighroom says I’m subscribed, but I’m not paying.🤷🏻‍♂️