It's not an opinion. Call Apple yourself and ask them. Many here have called Apple and have been told this is working as Apple intended. That's not an opinion. It's a fact.
Also, consider that this rolled out with iOS 17. And iOS 17 was released in September, going on 4 months ago. Many many many people have complained to Apple about this. And many updates have been released since iOS 17 was first released. And Apple has done nothing to change this. That isn't an opinion. That's a fact too.
So you can continue to wait for Apple to fix, what they clearly don't believe is broken. Or you can stop Sharing an Apple ID. Or you can live with merged call logs. Your choice completely.
I have mentioned this before, but I'm not sure why people are upset about this. Are you aware that whoever you share your Apple ID has had the ability to start reading your text messages, simply by checking your phone number on their iPhone in Messages, without your knowledge or permission? They've had this ability to do so for years. And did you know they have the ability togo to www.icloud and wipe your phone, again without your permission. They can change the Apple ID Password, effectively locking you out of your phone again, without your permission. There are definitely negative consequences in sharing an Apple ID, no matter how much you trust the person you share the ID with.