Why Brightness in laptop automatically increase or decreases

[Nayak Shri Trilochan Sai]

My laptop is running on windows 11 22h2 and i've noticed that the brightness doesn't stay the same level that i've set before shutting down or putting the device on sleep. After turning on or waking up the device i found that either the brightness in at 30-35% or it's at 50% but the screen is surely at lower levels but the brightness bar shows it's at 50%, the moment i click on the bar the brightness increases automatically without me changing the levels. I always keep brightness at 50% and change brightness based on content is set to battery only.

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