We use BG 3.0 aio and we never have any fit/leak issues except for when she's sleeping. She's a tummy sleeper and a skinny baby and without fail, we always have issues with leaking at the waist. Should I maybe add a hemp insert? Securing the dipe snugly at the waist makes it too tight around her legs. I'm getting so frustrated!
Re: Leaking only overnight and during naps- help!
I would try hemp inserts.
When DD became a tummy sleeper, pockets and AIOs just didn't work for her anymore. We switched to fitteds and wool (or PUL covers) and haven't had any leaks since.
If you're still interested in using the pockets...we use the Thirsties for night time because they have 2 inserts and we like the leg gussets which keep everything in. They are adjustable so you can make them as high up on the waist as you'd need. We have a tummy sleeper and have never had a problem...when we change her in the morning it seems like we could ring out all the pee it's so wet!
Also, have you tried to change the size settings? Maybe it's riding a little low?