Hey @Muhammed_Tufekyapan, we have a similar issue reported here that sounds the same as what you are seeing:
Yes, store was on the trial. Thanks for the clarification.
Just one thing, is this a new rule? Discounts don’t apply on the trial stores? I think we used to be able to define discount when stores on the trial?
Yes, actually. This is a new requirement that came with Shopify App Pricing: Shopify App Pricing: charge for usage, recurring subscriptions, or both - Shopify developer changelog
Hey @Paige-Shopify ,
Thanks for the clarification. By the way, I tested it for a store doesn’t on the trial and it isn’t working on paying stores, too 
Hey @Muhammed_Tufekyapan, is it possible the store was still in it’s trial period:
Will I lose my free trial if I sign up for a plan?
No. You won’t lose anything that you’ve done on your free trial when you sign up for a monthly plan.
If you sign up for a monthly plan during your free trial, then you won’t be charged any subscription fees until your free trial expires.
Impossible @KyleG-Shopify . They have been paid subscriber for years.
If needed, I can share the store and details privately.
Thanks for confirming that. If you can, it would help to reach out to our support team in the help center so we can look in to that securely. Feel free to link to this thread when you do that so this context is available.
