Hello!
While I’m looking at this issue, I would have several questions:
- 
Does apps currently in store (if any) still have product prices loaded?
 - 
Do products refuse to load in:
 
a. Xcode simulator
b. device (debug) build
c. downloaded from iTunes TestFlight (if you didn’t try it, give it a go)
- Try to call store.init() as soon as possible or insert delay before creating a new scene, to see if it would have some effect.