They are not deleted they are corrected grammatically to official (w546797681, w1201057549, w1201057543 and n8994200217).

(w1201057555) Where do you saw a flow on the surface waterfall?

And about this w546805598 the iD Editor mentioned as a doubled way so I just clicked fix button.
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            #REVIEWED_BAD #OSMCHA
            Published using OSMCha: https://osmcha.org/changesets/140250544
            