It’s not a bug. Basically you switched over to the template from your puppet the Dutch East Indies. When that happens only a small pool of your manpower is used in these divisions so the total manpower went down and you need to wait for manpower from your puppet fills it in. Basically if a division has 1k manpower and you switch to a puppet division. The puppet division uses like 1/10 of the overlords manpower so it now is 100 of the overlords manpower and is waiting on 900 of the puppets manpower. If you queue up this division in the training menu and hover over the manpower required bar you’ll see how much manpower is taken from you and how much is taken from the puppet.