The crashes occur if the server tries to load the char. There is no pattern except this.
There is no option to alter the launcher. All i can do is to implement something on the hook side that prevent loading the char.
But i dont have a clue how to do that currently. I need to make some thoughts about how i can prevent or detect that. So i cannot solve it now.
If you cant stop trying to enter the server with a corrupt char then well we have to live with that currently.