Bitey she is absoloutley perfect in every way except every single time she is left unsupervised she poos and wees everywhere.
If I go out for 10mins, half an hour or even am sat in a different room she makes a mess and also at night without fail it's disgusting by the time I get up. I've got up through the night for months but she still does it repeatedly.
I've filmed and watched her, she isn't worried,barking or crying and isn't showing and distress behaviour. She is usually lying around playing then just walks off poos and goes back to whatever she was doing.
She is fully toilet trained when I am around and has plenty of toys and another dog for company so it isn't lack of stimulation. Sometimes she does try and sneak off for a wee but I watch her like a hawk.
I always walk her before I leave and make sure she has been to the toilet. I never greet her and always ignore her when I've been out so she learns it isn't a big deal. I've also spent forever leaving her for minutes at a time but she isn't distressed so it's hard to judge! It's more like she knows she's alone so she will just go to the toilet wherever she feels like.
She's crate trained and happily uses one but poos in it and isn't concerned about lying in it 
She's 5 months old, hitting 25kg and I'm totally fed up of cleaning poo up, I feel like my house stinks constantly!
I'm sure it's more than a standard toilet training issue as she isn't stupid and she knows to go outside and on command. I've been doing the training with her since she was 8 weeks old and it's so frustrating
Sorry what a rant 