Screen recording delay

When I pull down the control centre and tap on screen recording, it will start the countdown as per usual, but after counting down to 1 there will be 5-6 seconds of delay (and the icon stays blank as the image below) before the screen record icon starts pulsing red and actually records the screen.

If i want to stop screen recording, even after tapping the pulsing red icon, it will still continue to pulse for another 10 seconds. But the actual recorded screen will have a footage of when the icon started pulsing and when i tap on it to stop recording, regardless that it is still pulsing for another 10 seconds.

I’ve tried restarting my phone but this bug still persists. I’ve updated the ios to the latest and this issue is still there. What do i do?