Is my stock Camera old?

Jul 6, 2019
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#1
Hi everyone, I've performed the Android 8 OS upgrade to 4.0.247 ST on my Z2 pro. I'm facing one issue using STOCK Camera app. I can't no longer take self-pictures within the heart rate. The red sensor is working properly in u-health app.
Not that It is so life threatening :), but just guessing why. Any ideas? Thank you!