Harriet became rattled. She disagreed with various calls that were fine and has allowed her opponent
to come back into the match.2-5 in the second
This isn't the first time recently that Harriet has been described as arguing re calls and last time the poster also said they were generally fine. And it clearly doesn't help her.
A few folk have said that she seems generally a bit quiet, maybe even shy, and maybe being more assertive in time might help her, but this doesn't seem to be the way.
I do hope that she can come back and get her match won. Be very good for her and us ( it ain't going too well generally ).