Okay, I had reported earlier that my apps had been "resetting" themselves. Things began to get worse, and I was no longer able to update apps, and later figured out those apps were stored on the SD card. All apps getting reset were on the SD card.
Also, maps could not update. Stored on SD card.
At first I thought this was an issue with this build, so I went to the trouble of rolling back. Same issue on the stable builds, except this time I can't remove the apps already on the SD card and could not format the SD card for fresh use. I pulled it out, ran some test on the card with my laptop, and the SD card has stopped saving data. There is a part of it that "in memory cache" or something will make it look like changes have been made until there is a soft reset on the phone. Changes only work up to a certain amount of memory, though. On the laptop, removing and reinserting the card restores everything to original state, all files exactly as they were before changes.
The card is faulty, for sure. No, it's not a fake card. I checked it thoroughly when I first bought it 2 years ago, and it checked fine then. I may have just abused it over the years and it may have been "used up" as it seems to have entered "read-only" mode at this point.
Getting a new card in the morning, but I'll hold off on trying Redstone again since I'm already back to .242 build right now. With the drama I've had I'll stick with that.