Several causes can interfere with auto-brightness on the iPhone 16e. updates, like a hypothetical iOS 18.4 release in March 2025, can introduce bugs, earlier betas, like iOS 18 beta 4, suffered from the same dimming quirks.
A misaligned screen protector or case will clog the sensor, changing readings. Overheating, as a known culprit even when auto-brightness is disabled, may change settings in order to protect hardware. Some other reasons are features like Low Power Mode or True Tone that change brightness levels automatically. Hardware malfunctions, although less likely, may happen if the sensor is defective.
