Then you can help Batocera fix them by writing up or adding appropriate information to the logs. That is the purpose of the betas, so they can be fixed before the stable. I’ve personally gone and addressed issues that have cropped up with Flycast/Dreamcast, so it will be fine for the v36 image.
There is no supported way to update individual emulators, outside of compiling them yourself in your own custom image. That is the point of Batocera, when you need to upgrade, there is only one file to upgrade,
boot/batocera. That’s it.