Uninstalling conflict

Uninstall has a higher preference, so if the device is in both install and uninstall groups.. It will just uninstall and not install again.

Important scenarios exist when including or excluding app assignments:

Exclusion takes precedence over inclusion in the following same group type scenarios:

Including user groups and excluding user groups when assigning apps

Including device groups and excluding device group when assigning apps

For example, if you assign a device group to the All corporate users user group, but exclude members in the Senior Management Staff user group, All corporate users except the Senior Management staff get the assignment, because both groups are user groups.

Intune doesn't evaluate user-to-device group relationships. If you assign apps to mixed groups, the results may not be what you want or expect.

For example, if you assign a device group to the All Users user group, but exclude an All personal devices device group. In this mixed group app assignment, All users get the app. The exclusion does not apply.

As a result, it's not recommended to assign apps to mixed groups.

https://docs.microsoft.com/en-us/mem/intune/apps/apps-inc-exl-assignments