Noticed on a couple of occasions that I'll randomly load up a much older save when doing a quick-load. Specifically, both instances I've encountered take me back to when I just finished
Spoiler
the ArcJet Mission with Paladin Danse.
No matter how many times I quick load after it occurs I'll end up in that same spot. Fortunately I've had save's not too far apart from when I last quick-saved, but figured it would be worth mentioning.
I should add this behavior seemed to have started after applying the beta Steam patch.