This article describes an iphone bug for the multiple pick-list type.
The issue is reported to Apple Support, and is not monitored by Connexys.
If the type of multiple pick-list can be used, we advise to use the type check-boxes.
Bug Reproduction Path
1. Apply Form via mobile [iPhone IOS 9.3.4]
2. Tap instantly a multiple picklist field
3. Select multiple options, say 3
The field shows says I have 2 options, and again open the picker shows indeed 2 checked
5. Tap a previous field on the form, and go through the "next" arrow to the multiple picklist field.
RESULT: The field say again that I have chosen 3, and again open the picker shows indeed 3 checked.