Xiaomi pad lock screen/sleep timer keep resetting to 5 minutes even when I set it to never turn off. Why?

I'm curious how does this happens.

Does the front camera always look for movement and will lock device when see no movement? This is just weird

I run macro Klick'r to do reroll on some gachas games. I've set it to loop perfectly (login > roll > record roll + ID > reset data > login). It works fine when I'm nearby keep watching it but when I left to sleep it always stops somewhere between 30 to 60 mins after I ran the macro.