iOS Messages not repeating alert notifications
I'm using an iPhone 11 on iOS 13.0.
When I receive a text message, my iPhone doesn't repeat the notification alert, despite the Repeat Alerts option being set to Once.
These are my configurations under Settings > Notifications > Messages:
Solution 1:
https://support.apple.com/en-us/HT210393#132
iOS update 13.2 fixes this issue.