Why ramen tastes so much better when you eat it at the restaurant
The noodles lose quality quickly and should not be reheated. Especially after soaking in broth for any amount of time.
This is what one article on the internet had to say:
"Serious ramen chefs are notoriously militant about noodle-eating etiquette. They say that perfect noodles will only last for five minutes after they are added to the hot broth—any longer than that and they become overcooked and mushy—so as a patron, it's your duty to start eating as soon as the bowl is delivered and not stop until you're finished; Hence the wild slurping you'll find in a typical Japanese ramen shop."