This behaviour is expected. To display contents of the geopoint question, use 'string(${myLocation})'. For more information, refer to the updated document located at http://doc.arcgis.com/en/survey123/desktop/create-surveys/xlsformformulas.htm#ESRI_SECTION1_1E82E2EA26344D23A2AF793CBDCA9AAB under the "Use the answer of a geopoint question to answer other questions" section.