I have buyed the new released Xiaomi Redmi Note 9S and i have problems with the Wifi. When you let the device to sleep for few hours wifi stops working. When turning on the phone from sleep the wifi dont work and you have to turn the wifi off and on to restore it, then i receive all the messages at once when the apps (Line, Whatsapp, etc) reconnect to inet. It seens to happen only if the device is sleep for few hours. If is only sleep for few minutes it works ok. Anyone experienced this issue, knows how to solve it?