Whenever you want to get Policy to apply, pay attention to the View that is used in the Policy. 

Whenever a Policy does not get assigned to the expected machine, it’s because the View used in the Policy, does not include the machine.

Make note of the View assigned to the Policy in question, navigate to the Machine list, change the View filter at the top of the page to the View used in the Policy, and refresh the page.  If the machines are no longer listed, the View is your issue. 

Correct the View, then once the machines are listed as part of that View, Reprocess Policies and they will apply.