Weird iP4 4.1 Proximity Sensor Issue

[TaterToT]

Ok so you know how the proximity sensor glows red now when in a phone call? Well when I answer a call, I see the red light come on, and then it goes off and I go back to having proximity problems.. But if when answering the call I put my thumb over the sensor it will stay red for the remainder of the phone call. (I can also do this by turning speaker phone on/off and holding my phone over the sensor) Anyone else had this problem? Any fix?

 

[goobot]

Idk. I just relized today while on the phone it turns red on 4.1

 

[TaterToT]

Here's a video... as you can see the light doesn't glow very bright at first, but if I move my thumb over it as it's being enabled, then it glows super bright (visible to the human eye)

http://www.youtube.com/watch?v=gE0WQ0PdkEY

 

[PastorSalad]

Same issue here, even when I put it to my ear, it doesn't recognise when I take it away, remaining dark. Only workaround found was using hands free or loudspeaker (leaving the sensor out of it). Granted it's not a dealbreaker, I can still receive calls and hang up with the lock button, but it's still incredibly annoying.

iPhone 4 on 4.1