WLAN adapter was disabled frequently after update to Volumio 3.198

Hello

I use Volumio on a RPI 2B with the Hifiberry DAC2-HD and a TPLINK TL-WN725N WLAN-adapter. With Volumio 3.179 all worked fine. After the update to V 3.198 the WLAN-adapter switched off after a few minutes. If I reboot the RPI the same appears again and again.

Thanks for help and regards