Subscriptions with Google Play Billing Library Purchases list is empty

[wojtek.357743]

I'm trying to implement subscriptions in my app that is using Google Play Billing Library using Meta Horizon Billing Compatibility SDK. I am able to retrieve list of all subscriptions, however when I try to test purchase one of the subscriptions the purchases list is empty.

When I call function

billingClient.queryPurchasesAsync

 I've got 

billingResult.responseCode == BillingResponseCode.OK

but the purchases list is empty.