Lost Seat Assignment
I am traveling with my partner on a round trip SFO-IAD-EZE (Buenos Aires) and wel ost all of our seat assignments. I went in to try and book new seats (since our original seats that were together for all 4 flights were no longer available) and the system assigned us seats in different rows, even though there were seats, although middle seats) together.
As someone who has done large systems integrations, I am amazed at this fiasco and how United had absolutely no contingency plans to manage fall out or issues.