trouble sleeping

i am here to beat that dead horse, but advice is needed. i have 14 week old twins (7 adj) who are starting to sleep way better. we no longer have to wake them at night to feed and they’ll each sleep like 5 hour stretches. twin A is struggling with his bassinet and im not sure why. he was in the NICU for 5 weeks so he got plenty of non contact napping in. over the last few nights he had waken up at least once an hour fussing. he’s super easy to console but will wake up 30-45 min later fussing again. the twins sleep in our room in a twin bassinet. twin B just sleeps and sleeps lol and it’d be nice if we even got a solid chunk of sleep from A. it was going okay up until about a week ago. we put them to sleep between 9-10:30pm, we’ve tried earlier but they both sleep worse if it’s too early. if we take him from the bassinet and one of us stays up, he’ll sleep without even moving a muscle lol even if he’s just lying on our bad and not necessarily in our arms. we’re so tired and i feel like we’re so close to those longer stretches we desperately need. help!

update: moved their mini cribs to our bedroom, first two nights have been a bit rough getting them to stay down around 4-6am. hoping they get used to them soon!