'on select' triggered for each option if arrow keys are used to go through the suggestions

i think the 'on select' should only trigger if the user press enter key or left click on a suggestion. atm if a user try to go though the suggestions using up down arrow keys then the 'on select' is triggered for each highlighted suggestion, in my case making markers on the map for each of those suggestions.
for now, is there an easy way to achieve what i want?