You can choose the most stable server for you by running a speed test.
Please tap/click "Select Location" to pull up the server list page, then click the clock icon to run a ping test.
You can choose locations you want to test in that list.
It may take about 10 minutes to finish the test, please choose the first server with the highest download speed.
Speed Test on Mobile
Speed Test on PC
Then you should choose the server with the highest download speed on mobile and the lowest latency on PC.