Loss of WIfi Network - Rpi4 Volumio 2.853

I open volumio on my smartphone or laptop by IP or volumio/local.

During playback on smartphone or laptop the I surf internet on an other tab in my browser.
When I return to the volumio tab it is not responding anymore. Also pingen the Raspberry Pi4 doesnt work. The music is still playing though.

When I keep the volumio tab active this doesnt seen to happen, only when I doesn’t use the browser-tab actively for some time.

Volumio Information

Volumio Version: 2.854
Hardware: Rpi4
DAC: Hifiberry DAC2HD

problems seems to be the router. After reset all works fine. Somehow it lose it settings :frowning: