Redundant tag inserted at the end.

Hello,

sometimes when I call some requests in my ReadyAPI project, some redundant tag is inserted at the end (screenshot here: http://prntscr.com/iau6b3) and so the request fails.

I make new test cases by cloning old ones, so I think it's some residuum from the original test case. However, I can't found the cause.

Had anybody similar problem?

Thanks