Yes, i did get this working eventually, the missing piece of the puzzle for me was the sandbox test account needed to have 2FA authentication setup. the flow for doing this was a bit weird and very non-obvious, IIRC it involved trying to sign into a production Apple service with the sandbox account, confirming the email addresa nd adding a phone number and then logging back into the sandbox service.
Hope this helps
QualityJohn-SC
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Also seeing this in a number of currencies e.g. UK price tier 60 is returning 99.99 instead of 89.99
Yes, this is still an issue after updating to iOS 16.1
iOS 16.0.3 Still no toggle.
My wifi connection is solid, i can make sandbox purchases without issue.