Incoming call display delay problem in my iPhone X

I have been facing this problem from the day I bought my new iPhone X. Every time someone calls the phone rings but the display appears after 3 ringtones. Obviously it’s a software issue, updated it to 11.2 still faced the same issue. When you restart, the issue goes away but comes back after a day or two. Now after updating it to 11.2.5 I am still facing this issue. Although now the display appears after two ringtones.

I am thinking when should I start getting worried about it. Apple should have resolved this issue in the first update itself. But now I have been dealing with the problem for 40 days.

Can anyone please tell me what to do and also if someone from Apple tell me when will the update come to resolve this issue. I am from India and using 64 gb iPhone X.

Thanks