20w fast charge heating issue IPhone 14 Pro Max

Hello everyone. Every time I use the 20w charger from iPad Pro 2021 to charge my iPhone 14 pro max, the battery status under last charged will show charging on hold due to iPhone temperature in last charged section. I charged the phone in a cool environment. However no temperature warning came out in the main screen.

Optimised battery charging is on.

Is this normal? Thanks.