Potty training the first

Natalie • I'm a stay at home mommy of one beautiful girl and 3 dogs. I'm also an erotic fantasy and paranormal romance author
So I'll be the first to admit I've been pretty relaxed when it comes to potty training. She's 3 but now that baby #2 is on the way I've been more on her about well I've hit a roadblock she wears diapers at night cuz she can't hold her bladder at night I have no issue with that but the first time we had her in underwear she pees without telling us! If she is bare butt there is no issue she'll go to the potty and call us to wipe but if she's wearing anything she doesn't even bother to try! Ugh more venting than anything lol but anyone else have trouble with potty training