Had similar situation few months ago
I confirmed from buyer, if its mistake or intentional
I also mentioned that if its intentional, I respect their opinion and if somewhere issue, will try to improve...
But buyer confirmed, it was due to confusion caused by new UI
I suggested to submit ticket. and they changed it.
Just make sure to use correct wording and that you aren't asking for 5/5
but to make review reflect exactly what client wants
and its not manipulation, but correction
Edit: Not sure how it will work now, as they disable review after 1h ?