In Observation Forms- Need to click twice to select drop down list for mandatory field

Hello Team, I am using bahmni version 0.93, I have created observation forms through Form builder. In that form, there are so many fields which are mandatory and have a drop down list in it. So when we are going to select an option from the drop down list we need to select the option twice. On the first click nothing has to be selected, we need to select it again.

I am attaching the screenshot of the form after selecting the drop down for the first time.

Please let me know if there’s any solution for this.