These issues are likely related to your internet connection - not talking about speeds but the connection itself. One thing that improves your overall connection is to disable Windows NDU service which monitors the connection speed:
Also, if possible, use some alternative DNS server which may or may not be configured in your router. If you got a router from your ISP chances are low you can alter these settings - if you got your own router try Google’s DNS server to see if it fixes these issues:
Other tips:
- Delete and disable rolling cache in sim
- If you are on Windows 11 repair your .NET installation (disable and enable it agin in your windows optional features, then restart)
- Delete your mapscache which can be found at C:\Users[your windows users name]\AppData\Local\FlightSimulator\mapscache ←delete the file and the folder inside this folder, it will be rebuilt on the next start of the simulator