I am having in update failed: "Unable to complete operation. Geometry could not be sent". I can edit it on the collector app but I can not update it although I can edit on the Web Map
Moved to Collector for ArcGIS so you have a chance on getting your question answered.
It could be an issue with mismatch of coordinate system. See this thread which has been answered. Update Failed - Geometry could not be set
May need to be bumped to Tech Support barring any new information
Retrieving data ...