Bottom-left of screen does not work in writing

when I am writing text on the phone keyboard (SMS or mail for ex.) my FP2 does not allow me to use the bottom-left part of the screen. so i can not digit A - Z - Q - S - shift key and numeric key.
this happens only in writing mode, the rest of the time the screen’s sensitivity is fine.
to notice that when the keybord phone is in orizontal way, it works fine on texting SMS and has problems only in mail mode for the two lignes on the bottom : shift - Z - X - C - V - B - N - M - delete - numeric - comma - space - dot - enter.
any issue??

A post was merged into an existing topic: Parts of the touchscreen don’t work