net
This has happened several times in matches I have called. Most of the time its when the served ball comes into the net. Nothing is done at that time.
I did have it happen once when I called a net violation. There was a high bad pass to the net falling right at the top and rolling just below the top tape pushing the net forward. The R team front row player contacts the ball (not in a block) just by pushing the ball through the net and deflects it. The S team setter was under the net ready to play the ball and because the R player defected it - I call a net violation on the R player. Point to the serving team.
So in reply to your question - It should be a judgement call if someone could have played the ball before it touched the floor.
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vb ref
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