Recently I have bought a MSI Prestige 15 and dual booted it with Windows 10 Pro and Ubuntu 18.04.3. Every time I turn off Ubuntu and enter Windows, the next time I enter ubuntu it has no "wifi adapter found". After that if I go to Windows again and disconnect the wifi network, Ubuntu finds wifi again. I got the firmware for the wifi adapter from official Intel Linux support here firmware (iwlwifi-cc-46).
Wifi adapter : Intel® Wi-Fi 6 AX200 160MHz
Linux Kernel: 5.3.9-050309-generic