Red tinted outline

I seem to be experiencing this weird red tinted outline around my Minecraft screen for a particular adventure map I'm playing called 'Captive Minecraft'. It does however disappear in F1 Mode. I don't have this problem in any other maps. It's extremely similar to how the outline of the screen darkens a tad when you're out of F1 mode in regular maps, except it's replaced it with this obnoxious red tint. I've provided some images along with my computer specs, but I'm fairly positive that it meets the criteria for Minecraft as it has ran smoothly for many years. Thanks.