Colleague seems to ignore team member

DEAR HARRIETTE: I was on a small group work call the other day, and I noticed that one person in the group blatantly ignored me when I spoke directly to her. At first, I thought she might not have heard me, but then it became increasingly clear that she was intentionally choosing not to engage with me. I wrote a follow-up group email, and everyone responded but her. I am completely confused as to …