The dynamic table dropdown editor for the dropdown option as shown in the image, prints the dropdown value outside the dropdown which needs to be corrected.

https://github.com/Alfresco/alfresco-ng2-components/blob/develop/lib/process-services/src/lib/form/widgets/dynamic-table/editors/dropdown/dropdown.editor.html ,the html has a span element out side of mat-form field is causing this.