Everytime i use a single earphone, do i have to reset both earphones to get then working together again? everytimr

anker liberty neo: everytimr i use one earphone on its own i cant seem to get then working togther again so i have to reset both of them -is there any way i can use one earphone while still allowing it to work with the other earphone - or must I reset it every time I use a single earphone when I want to use both together?