The only thing I can suggest, if you really want to find out what the cause is, is to remove all 3rd party plugins, and then test while putting 1 plugin back at a time, until the crash happens again. As far as debugging, to find out quicker, unfortunately, no. There are too many 3rd party variables.
The best course of action would be to install a clean copy of X-Plane, and then test. But seeing as you're on Steam, this isn't possible without removing your entire X-Plane installation, and then reinstalling a clean copy.