Hi lucid, there is an alpha issue with the Spriter addon that doesn't show semi-transparent objects.
Here is my bug report:
I have made a very minimal project where you can see the issue: cdn.discordapp.com/attachments/684104748848513151/721438405891850260/Bug_Package.zip
It contains the Bug folder with the Spriter project, Bug Draw with the spritesheet project and the Spriter.c3p that loads the scml in Construct 3 (c3runtime) [Draw Self] mode.
It is a very minimal fade project of a white rectangular image, so you can break it down easily. If you run the preview in Construct 3, it doesn't fade.
Preview:
Thank you very much!