Hey .
I Have been doing work and fro last two to three days whenever i opens my project only some of the assets show and while other becames invisible . I reopens it again and again . I took one day break also in hope so that it will works . But noooooooooooo
If you zoom in and out in the scene editor, does it solve the problem?
What version of GDevelop are you using?
GDevelop has this bug time to time, not easy to reproduce and to fix. I believe recently the devs closed the issue on GitHub because no one reported it for a long time 
After trying Open and close gdevelop again and again for 9 times . Finally worked (Yipeeeeee). I use the latest version
