S25 Ultra lock screen problem

When I try to unlock my phone by pressing the side button or tapping the screen, I often have to wait 5 to 10 seconds for the display to turn on. Sometimes, it appears as though the screen will not come on at all, which is quite concerning. This situation is very upsetting for me, and I kindly request your assistance in resolving the issue.

I already reported the issue via Samsung Members app but since I bought the phone this problem frustrates me, I already reset the phone 3 times already clear the cache etc.

How can I solve this and also how can I understand my phone is using One UI 7`s stable release or beta version?