I'm not an expert on films and their development, but surely can contribute lots of hands on experience with films stored for months at room temperature (which can hit 30C on hot summer days), both exposed and unexposed.

To make a long story short, I have not experienced a film that would suffer serious damage from this. In your case I would look for other sources of problems. Could you post some samples of a scan, maybe it was a trivial error we can lock down just from seeing the results.