Weird glitches with Corona effect in Studio Viewer, project has been open 24 hours

Steps:
1. I was doing some editing previous evening to SampleProject (NeedleSpeed, Corona, etc.)
2. Preview was working just fine
3. I left the project open and closed the lid of my laptop (Sleep)
4. The next morning I ran the same project, but the 3D Studio Viewer is showing some weird Corona effect glitches

Result:
See the attachment
The glitch is there even if I close the editor and open the project again