The JW Marriott Guanacaste Resort published a policy that they would not upgrade Marriott Platinum members to suites despite terms and conditions of the program saying Platinums are entitled to suite upgrades if available.
There are always going to be hotels that are more generous than others with respect to elite benefits. However this wasn’t just a non-compliant hotel, their policy not to comply was explicitly outlined on the Marriott website and in the Marriott app.