I have just purchased the new version of the 55 qt cooler with the improved gasket in the lid

A problem has arisen that I never would have imagined. As the cooler chills down, a vacuum is created to the point where the lid is impossible to open without prying it with 
something.  Very very tight 

Need a tight fitting lid that also allows lid to be opened.......like your refrigerator
Lid also shows indentations from the vacuum

Will be returning the cooler until this design flaw is corrected