Looks like 4 days ago our MV network was updated to firmware 3.23 Since then we're unable to make settings changes (zoom, focus, aperture, rotation, etc) just as @hwany experienced. Definitely not a hardware issue since it worked before and every camera we have onsite (MV21 & 71) currently suffers the problem. Before downgrading firmware I'm giving a shot with beta 3.24 right now.
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