Callback registration failed. Increase kMaxCallBack.

I cannot tell for sure, but it seems Unity crashes when you work on two projects simultaneously.

3101200--234133--Untitled-1.png

Looks like this happens when you switch back and forth between to Unity instances…

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Hi George,
Could you please file a bug report with a minimal reproduction case for this issue?

The problem is I don’t know how to reproduce it. I just suspect it happens when two instances of Unity are open, but I cannot tell for sure. I haven’t had this problem when only one instance of Unity is open… but again, I can’t tell if this is by sheer luck.