When flying craft with multiple probe cores, decoupling an individual probe doesn't properly turn the separate craft into a new controllable vehicle. I am unable to swap to the detached probe with left and right bracket, and it does not show up in the tracking center. Additionally, the probe still appears to be a part of the mothership craft, as any rotation inputs I perform while controlling the main craft are also done in the probe. In the staging section in the below photo, I am hovering over the ion engines for the probes, and the engines on the detached probe are also highlighted, indicating the game hasn't registered it as a separate vehicle.