The battery builders club

Whipped up a little 12s2p yesterday and it’s draining by about 0.2W the whole time, any ideas? It’s been staying balanced so I don’t think it’s a particular cell

Running charge and balance only LLT BMS, battery is in a Meepo V3 enclosure (connected to charge port directly so no charge feedback because 12s and a tap off cells 1 and 11 for battery voltage display)