Work profile apps

Hello,

I'm rolling out Android Enterprise in a PoC.

On OnePlus device the available apps in work profile includes some application from the device. (Like Facebook and Instagram while these are not configured as assigned app.)

On Huawei POT-LX1 device users can add app from the installed apps in the Personal profile to the work profile.

Does anybody have this experience?

How can I block theses?

Thanks in advance!

BR,

FJuhasz