SEIV is fairly robust most of the time, but it still has some bugs. There's a list of them
here, though little effort has been made to make sure it's up to date, clear, and accurate, and many of the bugs listed there are minor display issues and other stuff I wouldn't really call bugs. Just scanning it briefly, I also noticed at least one entry that was just a one-off "it crashed" with no information about what caused it besides that the game was big, and it appears that most of the entries were just copy/pasted without modification from the original report.