Strange iPhone 12 Power On button behavior

Thx ado_apple for responding to my initial post, but that doesn't answer my question. I was very specific how my phone responds when powering on. As I was saying, every instruction regarding how to power on your iPhone says to hold the power button down until the apple appears on the screen. Just clicking the power button on mine starts it up without holding it down. Therefore, if my phone starts with just a tap of the power button, that seems to be strange behavior since it goes against the instructions on how to power up your iPhone. I would like to know if this is indeed abnormal behavior, and if so, is there anyone else who has experienced the same. I am concerned that perhaps my iPhone has somehow become compromised. While I appreciate having a community specialist respond, I would greatly appreciate hearing from others in the community who might have had a similar issue or who might have an explanation and not just provide a generic link.