nope, it's a SED bug i think.
it has nothing to do with the amount of times you run it, nor the size of the screen whatsoever.
this happens after you made a script error...
whenever you made a mistake (or accidentally ran the wrong file, not main but some other file that should be included) it gives you a crash, says something along the lines of user error, and then simply wont run ever again above 640x480.
i experienced this a lot as well XD and it sucks!

regards,