Help! My Laptop Screen Won’t Duplicate Anymore

I've been using a laptop with two external monitors for about two years, typically duplicating the laptop screen onto the first monitor while expanding to the third monitor. Recently, it just stopped duplicating—I've made no changes to my setup or updated anything. Now, when I try to duplicate via Windows settings, it only lasts a couple of seconds before switching back to extended mode, despite both screens being the same resolution. All three displays are recognized in the right order, and I can still duplicate the two monitors without issue. Does anyone have suggestions on how to fix this?