Again, you need to list that address! You’ve been spending 5 to 6 months in another country since 2014 to date, roughly 7 years, this is not the same as basically “going on a business trip”. Your home address in Sri Lanka (since you spend the remaining half of each year, more or less) is your primary place of residence and should be listed as current address regardless of where you are at the moment, that enables you to be scheduled for your interview in Sri Lanka. You don’t necessarily have to list address changes 52 times on the DS260 form, figure out how to list both one time each as your residency in both countries is ongoing. I don’t know about Simon listing or not listing business trips, but I’m willing to bet his business trips were not back and forth between two countries where he was spending roughly six months a year in each country for several years back to back.