Hi @Nowshesaturtle
Welcome to the Sonos Community!
Do you have anything that extends the range of your WiFi? If so, please try turning it off to see if that helps. If it does, you can turn your device back on again, and things should remain stable - at least until the speakers or network are rebooted. Rebooting the extender again afterwards will again resolve this, but temporarily.
Sonos does not support the use of WiFi extenders as they typically do not do a good job, often filtering certain types of network packet that Sonos relies upon. Instead, we recommend the use of a much more robust mesh WiFi system.
If you don’t have any extenders, I recommend you try resetting the Sonos app. Once done, when you re-open the app you will need to opt to “Connect to an existing system”.
I also recommend that when you reboot your router, you leave it off for at least 30 seconds - if you did not do this, please try. It really can make a difference.
I hope this helps.
@Alexroy - the same advice goes to you 
"Common sense is the collection of prejudices acquired by age eighteen." - Albert Einstein