It's not just Thrulines, something odd is really going on!
I've just had a new match at 41 cMs over 5 segments and assessed by Ancestry as 4th-6th cousin. After checking her tree and finding a common surname, I went to look for more details about her by clicking on her name (in blue). When her details come up, it tells me that she
is either not a DNA match or has not taken a DNA test
.
She is not managed by anyone so it should give the usual information in a box with our names and predicted relationship and shared DNA!!
I've been doing this ever since I had my resuls 3-4 years ago so I'm nota novice.
What is going on

Add - she is appearing in common ancestors and thus in Thrulines! Using her tree, she is a 3C1R