@RE_Magic_Mirror Well…it depends.
If switching to develop branch fixed your problem, then you want to stay at develop until the changes are merged into the master branch. Until then, you can either update (see https://github.com/MichMich/MagicMirror#updating-your-magicmirror) or decide to ignore updates. If you don’t want to see the notification, you have to disable the update notification module.
If it did not help with your problem, then you are usually better off using the master branch, so I would suggest to switch back to master.