I have the same bug. 4 times today, Constructor crashed when inserting "Set variable" with global variable. 1 time it crashed also when inserting "set variable" with local variable.
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Construct 2 Check failure
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Check failure! This is probably a bug:
Returning NULL event variable
Condition: event_var != NULL
File: Projects\Parameters.cpp
Line: 285
Function: class EventVariable *__thiscall EventParameter::GetEventVariable(void) const
Build: release 66 (32-bit) checked
Component: Construct 2 IDE
(Last Win32 error: 0)