Go_to_way_point below the ground or set_velocity to negative until drone reaches the ground

[VascoSampaio]

If I send the uav to a position below z=0, it will land, the ual state becomes LANDED_ARMED, but then it is not possible to take off or do anything else. If trying to take off, UAL throws an error: "Exception thrown while processing service call: Invalid argument"

If the topic set_velocity z linear velocity is set to negative and the drone reaches the floor, the ual state doens't update (keeps as Flying)