Nesting setFilter() within a promise

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I have a dataset that will be filtered in different situations. I’d like the flexibility to be able to use .then. ie:

onClick(){
TestFilter(1)
.then(() =>{
TestFilter(2);
});

So one sort doesn’t risk overriding the other. With the code below, I’m getting the following error: “An error occurred in one of currentIndexChanged callbacks DatasetError: could not resolve dynamic filter”. Other operations work fine if I substitute them for the setFilter code, but something about the promise seems to be breaking setFilter. Any ideas?

function TestFilter(){   
     return new Promise((resolve, reject) => {
         console.log("passed return");
         $w("#GroupClasses").setFilter(wixData.filter()
            .eq("date", $w("#cDLog").value)  button click
            .eq("title", $w("#cTLog").value)  
        )
        .then(() => {
            console.log("Dataset is now filtered");
            var count = $w('#GroupClasses').getTotalCount();
            console.log(count + " items found");
            console.log($w("#GroupClasses").getCurrentItem());
            resolve("sorted")
        })
        .catch((err) => {
            //$w("#empty").show();
            reject("error message: " + err);
        });
        });
}