My #1 source of crashes in VP17 build 421 is when opening/checking/closing custom render templates. The bug has been happening for me with MagicYUV render templates, but not every time. Never had a problem with these templates in the last few versions. I don't know if it's limited to MagicYUV or not.
If a developer reads this, I've submitted 3 PRS reports today with my name in them.
Anyone else getting crashes when accessing custom render templates?