Let me start by iterating that I am not even close to sure as to what may have triggered this... occurrence. And because the area of the game that I am currently in may be involved with the glitch, I beg that you please be warned that spoilers may be involved subsequently in this post.
I am currently (not very far at all) with the story, on the beach near fort Joy. I have located Fane and The Red Prince, and recruited them both. Some short time between recruiting them, I noticed that the message saying 'Quicksave Successful' was no longer popping up after each F5. I checked the save data, and the game did indeed save, so I thought nothing of it.
About 5 minutes later, I found an ancient turtle. He destroyed me. However, mid combat, I noticed that all of the journal updates, save confirmations, and any other type of notifications seemed to all be postponed, and, all showed up quite quickly during battle with the turtles.
It seems to be nothing game-breaking, just peculiar, but I imagine someone may want to investigate.
Thank you