A number of bug fixes have gone out for crashes as of today's PBE deploy (finished about 2 hours ago). Reply here with a new ZIP of your Logs if you're encountering a game crash still. Also include what behavior you experienced leading up to the crash if you can!
A decent number of the crashes being experience are related to the DirectX 11 testing we're doing on PBE right now. DX11 will be disabled on PBE with Wednesday's update for the rest of the 10.15 PBE cycle so we can finish preparing 10.15 for Live release.