Collector for ArcGIS crashes when editing multipoint features

Description

In some instances, when attempting to edit multipoint features using the Edit feature option in Collector for ArcGIS, the application crashes.

Cause

This is a known limitation. When editing a feature class with multipoint features, each point is duplicated and associated with one record. This creates a conflict, hence the application crashes. For more information, refer to BUG-000103686.

Solution or Workaround

To resolve this issue, convert the multipoint feature class to a single-point feature class using the Multipart to Singlepart tool in ArcMap or ArcGIS Pro. The Solution section in the technical article, Problem: The Intersect tool generates a multipoint feature class describes how to use the tool. After the multipoint features are converted to single-points, publish the single-point feature class to ArcGIS Online following the steps described in ArcGIS Online Help: Publish from ArcMap. Use the published feature service to create a web map, and sync the web map to edit the point features in Collector for ArcGIS.