Until Creator 6.0, the "Issues" tab showed issues only from the file that was being edited at the moment.
Creator 7.0 will frequently (but not always) show issues from a different file, which happens to be open at the moment, but not in the foreground.
I have not yet found a way to reproduce this consistently, but it happens very frequently. I will update this issue when I set a sequence of reproducing steps. Until then, I attach a screenshot. Notice that the problem file is not the one being edited.