execute event isn't work(on mouse click)

[MrMaoLin]

Describe the bug

when i load a new sense and then turn back ,i click the game object which is it will execute the flowchat normally ,However it does not. some time it will execute normally, However,when you click it many a time ,it will not execute any more (flowchat contain menu load sense and if ....)
To Reproduce

1. Go to the scene '...' in the FungusExample OR In a new scene, add the following '...'
2. Click on '....'
3. Scroll down to '....'
4. See error/undesired behaviour

Expected behavior

Screenshots
If applicable, add screenshots to help explain your problem.

Versions & Platform (please complete the following information):

• Unity version [e.g. 2019.2.20f1 or 2017.4.25]
• Fungus Version[e.g. v.3.12.0] This can be found in your Docs/ChangeLog or via Preferences->Fungus
• Editor OS: [e.g. Win 10 or OSX Mavericks]
• Build Platform [e.g. WebGL, Windows IL2CPP, iOS, Android]

Additional context
Add any other context about the problem here.

[MrMaoLin]

i debug the mouse position ,it's in the box collider2d area