I downloaded it yesterday evening without issue. This update is supposed to fix a multitasking bug. The funny thing is that I had this problem and it never occurred to me that it was a bug. I can't wait to check it tonight when I get home.
Nothing has dropped here yet on any of our devices. 13.1.3 is the last so I'm quite content to wait until I see it without 'going looking' through Settings / General / Software Update. Time to let the knots untangle themselves before I do any, simply because everything is working so well