DaVinci Resolve 15 Beta 5 - Crash

1) I have a clip of some sea wave action and am going for a psyncedelic effect
2) I apply OFX 'Edge Detection'
3) I apply OFX 'Lens Reflections'
4) If I move the timeline cursor with the mouse everything seems to work
5) If I play the clip (or render the clip) the application goes for a few seconds and then abruptly exits with no warning of failure.
System: Windows 10, i7-8700K, 32Gb memory, Nvidia GeForce 1070
2) I apply OFX 'Edge Detection'
3) I apply OFX 'Lens Reflections'
4) If I move the timeline cursor with the mouse everything seems to work
5) If I play the clip (or render the clip) the application goes for a few seconds and then abruptly exits with no warning of failure.
System: Windows 10, i7-8700K, 32Gb memory, Nvidia GeForce 1070