Welcome to the community, Ckaucoungou53!
Since Sunrise is already distributing the Connect Box 3, your device is now getting old, outdated, and probably end-of-life. Frequent connection drops are a symptom of this dying hardware. It is best to contact the hotline at (0800 707 707) and report these constant crashes. They will almost certainly replace your old device with a new model free of charge. Please make sure to replace all cables with the new ones included in the box. Then everything should run smoothly again, and if not, feel free to contact us here anytime.
Cheerio cosmo