Hi,
I don't konw what can be causing the crash, but a tip could solve the issue: If you create the render target at its maximum size at the very beginning, you don't need to delete and recreate it on resolution changes, you only need to set the sizes of the panel and the view. These sizes need to be set at the beginning too, so the view only uses the area determined by its size. Also, set the zbuffer to the maximum.

Salud!