Why does iPhone keep asking for my Apple ID password?

Hi,

iPhone keeps asking me to enter my Apple ID password like every **** day. It's about a month now!

I've heard the reason might be that someone is trying to hack into my account and they enter too many wrong passwords. Wow, this person must get a life! I mean come on! That can't be true. There must be some other reason...

I've already changed my password a couple of times.

I'm so tired of this crap. Any suggestions?

It's 11 pro, on latest iOS.