HTC One - FPS drop

Hello everyone,

A few days ago I posted about having lag on my HTC One:

http://forums.coronalabs.com/topic/45331-constant-movement-stutters/

Every second the FPS drops from 60 to 20 - 30. I closed all running applications but I saw no improvement. This even happens when there is no movement at all.

However when I keep moving my finger over the screen the FPS stays around 50 - 60 and I see no lag / stutter.

Is this a HTC One specific problem? Has anyone else noticed this?