User can select more than one group from the dropdown even if I kept maxSelctions value 1

I have created one editable grid and my one of the column is picker group field. I want user to select just a single group from the dropdown and I have used below code :

a!pickerFieldGroups(
label : "Task Assignee",
maxSelections : 1,
value : ri!value
)

Attached is mock up of my editable grid for reference. Rule input "value" is stored with type group (tried with and without selecting "Array" option). At the time of testing, I found that user can select more than one group from the dropdown even if I kept maxSelctions value 1.

Is this something related to use of picker filed in editable grid or I am missing any basic functionality?

Appreciate help on this!

OriginalPostID-143145

OriginalPostID-143145