A major issue I noticed for the first time tonight, when flying with real world weather turned on the outside air temperature will suddenly jump to +247 degrees and the aircraft will drop in airspeed and lose lift. It happened twice, once while I was level at FL190 over KPBI enroute from KMCO-KMIA and again after takeoff from KRDU while climbing through 7000ft. Both times the OAT went from +7 or so to +249. Switching to clear weather and switching back quickly didn’t resolve it, but switching to clear weather and waiting about 5 minutes and then switching back to live weather ‘fixed’ it, or the sim resolved the issue with the wrong live weather data itself within that time.