We can answer this better if you provide the model number. You find this on the range when you open the storage drawer and sticker to one side. You probably have to turn you head sideways to read it.
I did want to let you know that I found that there are no Frigidaire or Government mandated recalls on the range from 1998 to the present. However, I will check to see if there is a Factory service bulletin on this issue.
I also should let you know that I have seen similar issues with vents on other brands. So, unfortunately is is not unheard of.
Although, we could find no Factory Service Bulletin there still could be one (that was not available to us).
If you call Frigidaire directly at 1-706-860-4110 with your model and serial number they may be able to advise you on some type of fix for this issue.