Hi jorkata888,
Sometimes it may be necessary to quit Music Studio from the multitask switcher and restart it, in order for restored purchases to update.
In general, the App Store servers and iOS manage all purchase, payment and restore related processes. Apps can only trigger them, but the outcome depends on the App Store, which in your case should be the full purchase history of your Apple ID.
Unfortunately, there are cases where the App Store’s restore process doesn’t work as expected.
I’ll contact you via private message to help you to resolve this issue.