When I try to split a bill with a contact who is also a favourite, the checkbox next to their name is selected twice. Once under favourites and once under all contacts. The bill is then split 3 ways and the other person receives 2 payment requests.
If you try to deselect either checkbox both are unticked.
Details to reproduce: Select split this bill. Select a contact who is a favourite. OS: Android 13 / samsung 5.1 Device: s23 Ultra App Version: 5.18.0
Same issue! I use bill splits and shared tab all the time and with this same person. I’ve not added a new contact, nothing has changed, but the last 2 days i select one person to split the bill with and monzo automatically selects two contacts which is essentially the same person, and then splits the bill by 3 and not two. I have to manually remove one of the contacts each time.