Lockscreen not dismissed when app backgrounded

[NicoleYarroch]

Bug Report

On iOS 12 devices, the lockscreen is not dismissed correctly when the following steps are performed. I could not reproduce using the same app on iOS 13.

Reproduction Steps

1. Connect a video streaming app to a head unit using USB cord and launch the SDL app if necessary. Video should start streaming.
2. Trigger a DD_ON notification. This will show the lockscreen.
3. Put the app on the device in the background.
4. Tigger a DD_OFF notification.
5. Pull the USB cord (this destroys the transport).
6. Plug in the USB cord and wait for the "Waiting for App Name" alert on the HMI.
7. Bring the app on the device to the foreground.

Expected Behavior

The lockscreen should not show since the car is not moving or it should show briefly and then be dismissed.

Observed Behavior

The lockscreen does show. When I trigger a DD_OFF notification, another lockscreen presents over the lockscreen.

OS & Version Information

• iOS Version: 12.4.5
• SDL iOS Version: 6.5
• Testing Against: SYNC 3.0