Hello heide1,
Thanks for using the Apple Support Communities!
I understand that your Magic Mouse 2 is experiencing temporary disconnects and intermittently stops responding. We know that situations like this can be frustrating, but we’re here to help.
To begin troubleshooting, I suggest reading over and working through the steps located in the following article.
Follow these steps if your mouse or keyboard sometimes stops responding temporarily.
Click the mouse or trackpad or press a key on the keyboard to reconnect the device to the computer. It may take a moment for the device to respond.
- Wireless networks that operate on 2.4GHz may cause interference. Move cordless phone base stations, microwave ovens, and other 2.4GHz electrical devices away from your Mac if you suspect interference.
- Keep wireless devices within 10 meters (approximately 30 feet) of your Mac.
- Avoid putting metal objects between your wireless device and your Mac.
If your Apple wireless mouse, keyboard, or trackpad aren't working as expected - Apple Support
Cheers!