Larian Studios Forums Baldur's Gate III Baldur's Gate III - General Ability check vs ability saving throw different?

When casting 'Hex' the target has disadvantage on ability checks for one ability of your choosing. Many spells have ability saving throws, for instance burning hands has a dexterity saving throw. If I hex dexterity first then burning hands should the target have disadvantage on its saving throw? I ask because it does not appear to work that way and before I report it as a bug I wonder if it's working as it is supposed to. Is an ability check different than an ability saving throw?