Try identifying different attributes to make it more stable…generally new one should be an editable tag and remaining would be non editable try using something like that
if 1 does not work then use find children or for each ui element and last element will be the element you need as per explanation
idicate the element in find children activity and give the filter with tag and any other attribute which are same…or give the last selector her. make sure tos elect descendants in the properties
then from the outputvar use outputvar.Last to get the last selector which can be used as input for your next activity which is type into