Send Crash Report Bug after every log out.
If the “send crash report” message comes from the client and not the OS, (for Windows) go to C:/Users/<Username>/AppData/Roaming/Guild Wars 2. Open the Text Document called ArenaNet.log and scroll all the way to the bottom. Starting from the bottom, find the first line called —> Crash <— and paste it here
That should hopefully shed some light about the issue you’re having.