Not sure it's Corona related,
neither that it's not specifically related to my machine & config but ...
I was playing with grow Ivy and I noticed that I could have a redundant crash by choosing colors for vertex of different leaves (young, old, main..)
Just a click on the color selector, opening a new window, crashes max.
I've tried to switch to mental Ray and the color per age window open without problem.
So it might be more plugin related than Corona, but may be there's an easy workaround on Corona side about that ?