Can't undo after replacing object -action
I followed this tutorial: . After I reached the point:
"Now the events can be replaced with a reference to the family! In your event sheet, select all (Ctrl+A) then press R (for Replace Object). First choose the object you want to replace (in this case the Monster), then you can choose to replace it with the new family. "
After replacing the objects I realized I made a mistake. I pressed undo and this pop-up appeared: I replaced approximately 45 objects with the method described above. Apparently construct2 is unable to undo too many replace object -actions?
Steps to Reproduce Bug
 In eventsheet, press ctrl + A, then R and replace the objects.
 Press ctrl + Z
Operating System and Service Pack
Windows XP, SP3
Construct 2 Version ID