Default Flip Cover Magnet effect on Spen

Hi there,

Iím using a Leather Flip cover and recently I noticed exactly where the flipcover locking magnet placed at the right center of the screen the spen is almost inactive around that area. In the attached image you can see I draw horizontal lines towards the edge of the screen and around that area it couldnít draw line.

Then I keep the locking magnet away and it works perfectly. Any advice how to get ride off this issue. I donít want to use without the flipcover as it gives a great looks.

Also does the Magnet could damage the phone display in long term use?
Samsung Note 3: N9000 KitKat 4.4.2

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