My DNS changing location at everynight by it's own!

My NextDNS routing location changes automatically every night. During the day, my connection is routed through the Dubai NextDNS server, which provides good latency. However, at night, it switches to Frankfurt without me changing any settings.

When this happens, DNS latency increases significantly and browsing feels slower. I am located in Kuwait, so the Dubai server should normally be the closest and most suitable location.

Could you please investigate why my routing changes from Dubai to Frankfurt every night and whether it is possible to keep my connection routed through the Dubai server consistently?

Please let me know if you need any diagnostic results, traceroutes, or NextDNS test reports from both daytime and nighttime.