This is still a problem in b5. Are there any updates on this issue?

Thread here https://developer.apple.com/forums/thread/682285?page=1#684322022

An update. As per other suggestions updating to 13.2 RC resolved. This isn’t ideal.

We've discovered this overnight. It's seriously impacting us, issue seems to be having the number be optional. Broken key functionality in our widely used app. Really unnerving a regression like this can happen in a minor iOS release.