My 19mo old daughter strongly prefers me to my husband and it’s really starting to upset him. When…

My 19mo old daughter strongly prefers me to my husband and it’s really starting to upset him. When we are reading a book before bed she will fuss on his lap until she can sit on mine... she won’t greet him at the door always, sometimes she will fuss loudly if I’m holding her and then give her to him. Sometime she even pushes him away. Last night she cried for 15 minutes when I️ was showering. It’s probably just a phase and likely also attachment issues at this age, but it’s so sad and I️ want to help! Btw, I️ am still nursing, but I️ don’t want weaning to be the only answer. Any advice?