problem with polylinea and line with keyboard input

[SheWolf]

Bye to all,
I have a problem to draw polylines and lines, until I give commands with the mouse no problem, click here I click them and everything ok.
However, if you give the length of the keyboard lines you interrupt the command without drawing the last stretch.
Surely it is some setting but I can't find it

 

[MassiVonWeizen]

if you insert the values from the numeric keypad check to have activated the block/num.