I shouldn't be surprised anymore by stuff which has been part of my professional life for nearly thirty years.
But surprised I am on occasion.
Recently I have been involved in resolving disputes which grew from an unwillingness or inability to have a discussion felt to be slightly awkward or potentially difficult. Needless to say, exchanges then became more awkward and very difficult over time, particularly when seen through the twisted prism of email.
So the issue feeds on itself in the absence of discussion and resolution.