BUG B6 is completely weird with GH4 mp4's

This is in an ACES project

In the colour page with 4 or 5 nodes on a C4K GH4 clip

Sometimes the waveform is blank

Sometimes the image fails to update in Color but will in Edit

The Project is large with multiple camera formats. A DRP is available at
https://www.dropbox.com/sh/z49ljjg1vqc5snf/AADkaz-5_lhs7Y8DAs-gyJD_a?dl=0

Here's a screen cap of the Color Page for reference parked on on a GH4 clip.

Capture 1.JPG (583.13 KiB) Viewed 352 times

As the project crashes frequently after this color page behavior here are the logs
https://www.dropbox.com/s/w6rffs4g7jfbh0a/DaVinci-Resolve-logs-20180716-063803.zip?dl=0