UAV - Unpiloted Aerial Vehicle
Air Traffic Control Fully Certified
Communication Breakdown
ATC Issue All Types; Conflict Airborne Conflict; Inflight Event / Encounter VFR In IMC
Air Traffic Control Separated Traffic
Company Policy; Procedure
Unmanned MQ9s file IFR and depart to the resticted area; and then return; cancel IFR and land. Today low ceilings moved in after they departed; and they had to come back early. They had NO plan on what to do if they cannot cancel IFR; and they were flying around looking for a hole in the clouds to get down. They conflicted with the three IFR inbounds that I was vectoring. They also stated if they couldn't get below the clouds; that they would land. Ultimately they did find a hole in the clouds after getting 45 degrees left and right of course; causing a conflict with a northbound aircraft on the localizer at 4000. I then had to vector the MQ9s at this point to follow one of the aircraft. Something needs to be done to alleviate a situation from happening in the future. I have heard that this has happened multiple times. This is adding inherent risk to the NAS that doesn't need to. It just seems that the [drone operators] says we will fly; and if bad weather happens; then we can do whatever we want.
Approach Controller reported airborne conflict between UAV and commercial aircraft being vectored for approach.