I believe, and I am no expert is that their choreography went from across the ice rink and had some elements signalling that they were doing CHRS. So it fooled the so-called experts on the TP
I was surprised it wasn't corrected when the true CHRS happened. Very surprised.
But clearly, in ice dance, one rule hold true : you cannot attempt something twice... So if you miss a turn, it's gone... and here, apparently the TP felt they already had performed an element that looked like CHRS so they cannot do it again

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I am not expert but this is what I am thinking based on years of watching crazy ice dance calls.