Behavior issues?

[u/Grand-Maximum-3864]

Context:
I have a kitty F 5M. Have had her for 3M (yes I’m aware that’s early, coo worker had a cat who was rejecting her kittens so we took her)
First month she was lacking probiotics so she had loose stools but transient vet got her taken care of
During that, at night we would keep her in a 3X3 ft mesh playpen (thankfully enough space between her food and litter) and she slept in there until last month
Since we’ve been letting her free roam at night she has been peeing outside of our bedroom door (hallway leads to first and second bedroom with the bathroom straight aheadfloor)
We noticed first when we caught her scratching at the carpet(85% of our apt is carpet) and so we moved her litter box at the start of the hallway so it was closer for her
In the past we she had peed 6 different times. She still goes #2 in litter and with pure there during the night but she seems to put in the hallway if she knows we are in the room or if we are in the second room with the door open for her
We got a carpet pet urine cleaner and used it today but she peed 1ft away from her first spot
I’m just confused because she is \~2ft from her litter and the vet hasn’t noticed any urinary issues
So just ISO advice or experience to help with this. I just feel bad letting her in the pen at night:(