Ah, even with non-consumable purchases? We are testing on iOS 11 as well. So there is no repro for the issue as shown in the video i sent so far on your side?
I’ve seen the thread. Thread seems to be implying its Apple side issue and we cannot do anything about it.
Here’s a thread discussing handling of the issue by various projects that coded their own IAPs https://stackoverflow.com/questions/34001868/ios-this-in-app-purchase-has-already-been-bought-pop-up