Red clip outline in timeline after editing a subclip duratio

I'm trying to update the duration of a subclip in a timeline. When I do the clip is now shown in red and outputs black in the timeline viewer when played.
Steps:
1-Add subclip to timeline
2-Update the subclip duration and click update(right click from timeline). I added 1 sec to the duration.
OS version: Windows 10 Version 1803(OS Build 17134.165)
Resolve Version: 15.0.0B.073
GPU: GTX-1060-6GB
Steps:
1-Add subclip to timeline
2-Update the subclip duration and click update(right click from timeline). I added 1 sec to the duration.
OS version: Windows 10 Version 1803(OS Build 17134.165)
Resolve Version: 15.0.0B.073
GPU: GTX-1060-6GB