After the computer has been in sleep, the wifi and bluetooth indicators are missing in wingpanel. Using lspci shows that the wireless controller is missing. Reboot doesnt fix the problem but turning the computer completely off and on again does. Then lspci shows Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter, bluetooth and wifi is working normally. Running elementaryOS with latest updates on Dell xps 9370.