I have the same problem. (like the video you shared)
I discover (using STUDIO, but also IDE…) if I close the gripper and then I change the Z position (e.g. Z>100) the gripper automatically is opened. If I change again the Z position under a limit (e.g.) the gripper is closed.
I don’t know if this is an anomaly (bug) or not.
Using both the firmware 3.2.0 and 4.4.0… same behavior
Did you fix this problem ?