Problem with phone app

Hello everyone,
When phone is near the ear during call, display sometimes goes on and then off. It's very strange, because test of proximity sensor passes well. Last time I turned on airplane mode on by mistake. Another time I hanged a call. Maybe adjusting minimum distance for turning on screen could resolve my problem?
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Comments
Unfortunately not.
We have to convince the ASUS to switch to the standard behavior of the Power button during a call.
Read this whole thread:
https://zentalk.asus.com/en/discussion/7473/asus-calling-screen-annoy-screen/p1
But I like proximity sensor feature. I think its just bad implementation.
This is not a bad implementation, it is best possible due to the non-standard placement of the sensor and speaker compared to other phones, so when calling you must hold ZF6 completely differently, not parallel to the ear, but you have to push into the ear with the upper edge (where is the sensor and speaker placed).
In the whole year since its launch, the behavior of the sensor has not improved a bit so the only possible solution - workaround, is to ensure the standard behavior of the power button at least.