Comp container was still remain red as if it has never been rendered before.
I’ve just created a comp, added some fade out and fade in using Soft effect directly from Nuke Studio time line onto the plate.
I tried for too long with many different approaches by ticking here and there to get the comp render to the timeline.
I have checked the destination folder where the render files were supposed to be and they are there, there were no errors or warnings, but the comp container were remaining in red color as if it has never been rendered.
Here is the explanation in this video on how to fix the render color issue for a container has been already rendered.
I hope you find this video helpful to you. Thanks for watching.