Apple Watch Ultra vibrates from incoming phone calls in Sleep Focus mode (since having IPhone 17 Pro Max)

Since having the iPhone Pro Max 17, my Apple Watch Ultra now vibrates when receiving incoming calls when it is on sleep focus mode and silent mode. When I had my old phone (iPhone pro max 15), everything worked fine and I would pop my watch onto sleep mode before going to bed and it wouldn’t vibrate at all during the night. I have tried everything to fix this; Restarting both devices, unpairing/re-pairing, updating software, deleted sleep focus and re-making it, ensuring all notifications and prioritised notifications are off and not allowed to come through on sleep focus mode. It only happens on phone calls, this includes all phone calls even from numbers not saved in my contacts - therefore not just my favourite contacts or repeated callers. I don’t know what else to try?! Thank you in advance for any help!