iPhone keyboard is not smooth with reduced transparency enabled

As described when I slide down on Home Screen the keyboard transition is laggy and not smooth this happens when the reduced transparency mode is enabled only. It’s slightly better when reduced motion is on as well but not as smooth as the normal conditions where reduced transparency is off and reduced motion is off. This was since iphone 12 pro max and it bothers me a lot I feel it’s an interface problem that needs to be solved. Attached screenshot of the laggy transition im using 15 pro max and I have tried all troubleshooting options by apple support chat. Please, advise