From the linked article: She said in a written questionnaire at the time that she did not remember ever posting about Stone or any other figures involved in the case. “I was zeroed in about Roger Stone in responding to that question, but I still didn’t remember,” she said Tuesday.
What is the evidence that the juror "celebrated" Stone's arrest? What is it that the juror "still didn't remember" during the original questioning?
The linked article is shamefully ambiguous and if done intentionally constitutes "fake news".
Although I haven't followed Stone's case, I have read that he was supposedly convicted of "helping cover up for Trump", whatever that is supposed to mean. That would seem to mean that Trump qualifies as "a figure involved in the case". Did the Judge exclude jurors who posted negative opinions about Trump or didn't she? That seems to be a key question?
What am I missing here?
Yes, she posted when Stone was arrested.