I have the same issue after updating yesterday. It's across all view modes - scrambled/dark static images. I've purged the cache and cleared all preferences and it's still happening. I also get the red stripe that Tamara mentioned in preview mode.
iMac Pro (2017)
Processor: 3.2 GHz Intel Xeon W
Graphics card: Radeon Pro Vega 56 8176 MB
OS: Mac Mojave 10.14
I have the same issue after updating yesterday. It's across all view modes - scrambled/dark static images. I've purged the cache and cleared all preferences and it's still happening. I also get the red stripe that Tamara mentioned in preview mode.
iMac Pro (2017)
Processor: 3.2 GHz Intel Xeon W
Graphics card: Radeon Pro Vega 56 8176 MB
OS: Mac Mojave 10.14
All programs are up to date.