App widget not appearing in widget list (intermittent)

There seems to be a long running issue with WidgetKit where some users don't see the widget when trying to add to their Home Screen. (even after opening the app for the first time).

I have been able to reproduce myself intermittently, and typically restarting the phone or re-installing the app fixes the problem. However, some of my users have encountered this and end up requesting refunds because they think the app is broken.

Has anybody else experienced this issue?

Would be great to get this bug resolved as it's frustrating for users.