Overheating, Typing Error with Latency

Hi Apple folks,

I updated iOS 16.7.7 on Mar'22.

Till today, my iPhone X still generates overheating after using Safari and Apps (news) for 5-10 minutes.

After iOS 16.7.7, I noticed followings:

1. Grayish tone display especially when opening Safari. The "foggy" keyboard obvious.
2. Keyboard becomes less sensitive, latent, and keep repeating the "wrong" letter next to the one I type. Such issue becomes prevalent even prior to the upgrade of iOS 16.7.7..I would say it has been lasting for the last 6 months or more.

I have my battery replaced at Apple Store couple months ago.

Health condition is 100% now.

After few years of using iPhone, there are 3 things I really appreciate and enjoy; namely the security and the flawless typing keyboard.

Cheers