This was discussed over a week ago. I haven't paid much attention to my Ancestry matches because I am too busy coordinating my FTDNA and GedMatch actual chromosome matches. I checked an Ancestry/GedMatch match and I STILL get a {null} error when I click the second and subsequent possible names. If I click the name again 2 or 3 times, I can finally see the compare window.

I am using Firefox. Is this now becoming a feature?