We have built an application using WAB and are utilizing the group filter widget. We have it setup using one layer with around 90 features and filtering on one attribute. Using the application in Google Chrome it works as expected. When using the application in Internet Explorer the group filter widget will barely work. On occasion it will populate the dropdown with the values but the majority of the time it is unusable. We have tested publishing the layer as a service from ArcGIS Server and as a hosted feature service with in Portal. The results are the same. Has anyone else experienced this issue and hopefully found a resolution?