2-3 hr nursing sessions

Around 2 weeks my daughter was having 2 hour long or longer nursing sessions. She would unlatch and rematch multiple times, still displaying hunger signals. I assumed it was cluster feeding and it went on at least once a day. Not at almost 4 weeks it still continues. Atleast once a day she eats for 2-3 hours. Is this normal? Why is this? Is it just comfort nursing? If so why does she still display hunger cues? I’m not sure what’s going on. It has me questioning my supply. But it’s not like this t every feeding. She’s gaining weight and has 1-2 stools a day and 10 wet diapers. Any insight?