With Volumio 2.029 all RasPi Devices are loosing Wlan connection when a new device is connected to the Rooter f.e.g. a smartphone.
Knows any body why? Is it Volumio specific or depending on Rooter settings? With Vol. 1.51 this happens never.
I would say this might depend on your router and the new dhcp client…
Can you try with another router?