Optimize Pop with external monitor? - eviltoast

my laptop resolution is 2256x1504, while my monitor has standard 1920x1080. when I start Pop is always default 200% scale, even I changed it to 100% before. I have to manually set it to 100% scale on my laptop and monitor. But it would not sustain. When I unplug hdmi and reconnect, everything goes back to default. Is there any ways I can optimize this? thank you