Parts of the touchscreen don't work - See first post for troubleshooting

Help Fairphone 2
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42

Hi, thanks for moving.
I tried a drawing test with 2 differents app and had the same result.

image.png1080×1326 42.9 KB

It’s strange cause it seems another part of the screen not responding when I draw and when I write text (?).
I also experienced twice something similar to this

Is that depeding from the same issue??
I think that I’ll write to support and ask for screen replacement.
Thanks