Screen keeps timing out (blacking out)

I have recently fixed an iPhone 15 pro max screen. I use a soft OLED panel with 120hz refresh rate. It's not an original Apple screen but, they are very good aftermarket OLED panels from a very well-known supplier. The customer called about the screen timing out or blacking out too soon and too often. The customer has to wake up the screen by tapping it.

Has any had a similar issue? Ultimately, Ill swap the screen but, I have not had this particular issue after a screen repair and wanted to get some input on what the issue may be.