Luban (artisan) filament change bug

I use Luban in my Artisan, I had to change the filament, I had some work to do and I couldn’t make the change instantly, I noticed that it lowered the temperature of the nozzle. Since I was on the change screen, I could not go back and increase the nozzle temperature. The part was damaged because I could not continue printing where it left off,

In short, after waiting for a while on the filament change screen, the nozzle cannot maintain its temperature.