ESRI Collector for ArcGIS on Windows offline may encounter the clock issue described at the following web page. https://support.esri.com/en/technical-article/000018485 Using point averaging seems to be the easiest workaround at this time.
https://github.com/Esri/collector-tools/archive/master.zip This toolbox provides an quick method of adding the GNSS Metadata (receiver, lat, long, altitude, pdop) to a feature class to be used in collector.