Connection to ipad lost

The same issue as always. Connection between ipad and RS150B lost after starting a video and closing ipad screen. As always can not reconnect the ipad to the rose. Fritzbox tells me, android devise is connected to lan/wlan an internet. But searching the device from the ipad with rose app failed complete. So again i want to ask if you take back your fuking devise? Cause i do not need a streamer that does not work. Connection with amazon music is the same , not able to find the rose devise at all.
@Rosehan Do not tell me the same things again. They do not work.

So, made a complete reset of the device. Really nice is that now I can not login to Rose, using my login data from here. Please use rose connect to find your e-mail and your password…… really???