You have enabled the option in MLV menu to not split files at 4GB, but this requires an ExFAT formatted card, and your card is not formatted as ExFAT. Depending on card size, Canon firmware might format the card as Fat32 instead of ExFAT. So either turn off this option or use your computer to format the card as ExFAT.
If you encounter a problem when you update to a new build, figure out how to precisely reproduce it, and then go back and try older builds and see if the problem goes away. If it goes away, please report it and tell the builds where it worked and when it started failing, and exactly how to reproduce it. It's very easy to fix issues if you give and exact build when it first broke, and steps to reproduce. Otherwise, if the problem doesn't go away with older builds, well it was there all along, you just haven't encountered it before, and falsely associated the problem with newer versions.