A fix is to select Clear Skies at the start menu before loading your first flight. Once you set it, you won’t have to change it from the menu. Load up your flight, and once in the flight deck, select live weather from the top menu. Has worked every single time for me for multiple flights. The key is you have to select clear skies BEFORE you load your first flight. It’s a pain to click the weather once in the flightdeck each time, but until a fix, it’s one more click vs re-loading the sim.