Thanks for your reply Miaogeng - The feature does participate in a relationship class, 1:many with a table.
So although we just want to "Copy... at the same location, Different feature, copy location", this is being blocked because the feature class has a related table?
Any plans to include this functionality, or snapping in general, in Collector App?
Also, could not find this limitation/functionality anywhere in Esri's documentation. Please send a link if it does, otherwise may want to include a note somewhere in the Collector App/Preparing Data sections so others with similar workflows don't find out the hard way as well.
https://doc.arcgis.com/en/collector/android/collect-data/add-a-feature.htm or
https://doc.arcgis.com/en/collector/android/create-maps/faqs-create-map.htm#anchor3