The problem is as follows.
iPhone 14 Pro Max, installed iOS 18 beta 4.
After locking the screen, the brightness resets to the lowest value. This happens every time the phone is locked.
It doesn't matter if True Tone is enabled or not; the brightness automatically sets to the lowest level. Almost to zero.
Please fix this.
check your phone again looks like they just did another update beta; lets see if this solves it ; having same issue
The new version of IOS 18 Beta 4 fixes this issue
Same
Same issue
Go to Settings - Accessibility - Display and Text Size - scroll down to Auto Brightness and turn it off