Sorry to hear about the troubles you've been having.
Is it one specific speaker that is having this issue, or are all three doing this? A simple power cycle of the system or wireless router doesn't resolve the issue?
Do the three speakers all have different names?
Thank you for the response. From what you have mentioned, it does sound like there is an issue with the system itself. Please give a call to your regional service group. If you go to the site HERE, select your country, scroll down and click on "Contact Us", you should see their phone number.