Hi, I am experiencing the exact same problem, I began to notice it one week ago or so. At first, I thought it was caused by my connection (so I tried the usual, reconnect my WiFi toggling online functions in the game off and on etc), but the same thing happened in the following days. It’s actually bothering me so much that I registered on this forum just to post on this thread, lol.
I believe this bug is related with the distance from the departure airport, and not with the elapsed time. What I think it’s happening: when you begin the flight, the sim loads just the Live Weather that’s inside a specific radius from the departure airport. That’s probably how it always worked. The difference now is that it’s not loading anything afterwards, like it’s missing a command to keep loading the weather or not being able to connect with the servers with the game running for some reason.
So, this bug doesn’t happen when you flight shorter distances. Today I did a shorter one (SBGR-SBJV, around 210NM) and was able to land with real weather conditions. But whenever I try to go farther than 250-300NM, the Live Weather resets to the “clear skies” preset at some point and stays like that until the end of the flight. And if I try to start another flight in sequence, it doesn’t load at all, just like it’s happening with you.
I have already experienced the same problem flying in Brazil and Japan, so it’s not related to a particular place. It happened with the A320, 747, CJ4 and King Air, so I believe it has not to do with a particular airplane, just with the distance of the flight.
Right now, if I want to land with real conditions in an airport farther than 300NM from the departure one, I have to look the METAR and the weather conditions in a website like windy.com and set the weather myself (wind, temperature, pressure, clouds). It’s really frustrating, and it worries me that just a few people are complaining about that. I’ve already filed a zendesk report, but received no answer as well. I’ll keep waiting for some fix, hoping it’s coming before February, because it’s ruining my will to play right now.