No idea off the top of my head - would need more info, e.g. a video grab of how it looks, the scene itself, does it happen with other scenes or just that one, what was the missing plugin on the DR machine, does it still happen even if the slave machine is not running DR, even does it still happen today :) Which version of Max too. Does it happen with earlier versions of Corona, if it is still happening just now.
Not heard any similar report, which is why we'd need as much info as possible - and if you think it's a bug, best to post that information in a separate thread as it will get missed / lost in a resolved feature request thread :)