Thanks for writing in! Sorry to hear about the detection issues, but would be happy to help!
Is the new switch a managed switch or just a pass through?
If you remote the switch from your ecosystem, does the issue still occur?
Let us know so we can further assist!
Tony A - Community Support
Hi again, so before I read or understand what have you said
please allow me to say sorry cause I've determined the problem and it was actually that the soundtouch 10 takes long time to appear as "searching for speakers" and sometimes both 10 and 20 takes long time sometimes I need to restart the router