When the Xiaomi Smart Band 9 Pro has the Raise to wake feature turned off and the Always-on display (AOD) function enabled, you can notice that the AOD maximum brightness dims after covering to sleep and shining a flashlight or strong light on it, especially when the screen brightness exceeds the 60nit limit. This happens because, to save power, the AOD brightness is adjusted to a standard 60nit. Due to the slight dimming in earlier versions, this issue will be optimized in a future OTA update. Please continue using the device as normal and wait for the upcoming OTA version.