Skype for Business app forgets users credentials when managed by Intune

I'm finding Skype for Business Application Version: 6.21.0.17 on Android 8 forgets the users credentials when managed by Intune. The app reprompts for credentials when restarted after the phone restarts or the app is forced to close.

No other MSFT apps managed by Intune forgets the credentials. This is a major blocker on us rolling out the app.

We've raised a call with MSFT support, but wondered if anyone else has seen this.