No, not having that experience at all. Sounds like you may have other issues going on. The next time it crashes, and you have to reinstall it, submit a system diagnostic within 10 minutes of that crash, and call Sonos Support to discuss it. The diagnostic gathers information from the speakers in addition to the controller, there might be information there to explain why the remote control (the app on your phone) is crashing, since all the real action is on your speakers. 

A weekly issue really makes me suspect DHCP addressing issues. Really hard to pin down but simple to ignore “why” and just apply the fix.

In your router’s DHCP Settings page assign each Sonos device a static/reserved IP address. The Help screen there should have instructions.

Power down all Sonos, reboot router and controller and power up Sonos.

I still have an issue with the Sonos App after all these Sonos updates.  Sometimes the app refuses to switch on, request you to join an existing network. When you have different zones all active playing music and you want to activate the tv mode, one section will still connect, after struggling the Moves 2 will still be playing music one section playing tv.

Have you called Sonos Support directly to discuss it?

When you speak directly to the phone folks, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.