Crash log is in attachment. I created a VFX asset in a test project, and did some changes, saved. The next day, when I open this project, I try to directly open the VFX asset and want to edit something, Unity crashed. And it's 100% reproduce on my machine. As usual, I opened a bug report, but your QA can't reproduce it, and she/he refuses to forward it to your dev team. So I post it here, I hope some of you can help me for how to get around this bug. https://unity3d.atlassian.net/servicedesk/customer/portal/2/IN-9153 This is the bug report I made. There is a video to prove this bug happens inside.