I have the exact same problem. I have thousands of contacts in my address book. Could it be it’s trying to find the person in the address book to display their name and pic if assigned and it’s taking up to 5-7 rings before it can find it?
I find that to be the only possibility but when looking up contacts it’s fast so where’s the bottleneck?
I also have an iPhone X. Same problem occurred with my previous iPhone 6S.
Thanks to the initial person for bringing up this topic. It’s quite frustrating and people always ask “why does it take you so long to answer the phone”. It’s now getting embarrassing.
I also have a serious problem when adding a calander event. When I click location the phone freezes. Both again on 6S and X phones.
Also, I notice there’s no cashing of common words when typing. The predictive typing is just absurd. Pulls words in other languages from the notes field in my address book.
Any way to clear cash to try to resolve the problem?