Battery power over power plug

Hey I have an Organelle M with newest update. Every time I use it with batteries inside and plugged into a wall socket or ripcord it still uses batteries instead of switching to the “cable”. Fun fact - the moment batteries run out it switches to power cable xD Is it something to change in config files or maybe it’s because I’m in UK and there is difference in power delivery.
It’s not a deal breaker but it’s a bit annoying to take out battery every time I’m at the desk and putting them back when I leave.