HP 41 lcd display and 82143 printer behavior

[Oulan]

When updating go41cx to last android version, I encounter a strange behavior with the printer (I do not have a real printer, just 2 HP41c/cx)

Using PRPLOT with SIN function, plotting in DEG mode (y from -1 to 1, axis 0, x from 0 to 360, step 10) I have the following behavior of the goose :

1) moving from left to right for some steps
2) then jumping from middle position to the leftmost one
3) goto 1)

But when using py41d (python emulator for the prime) I have the following behavior for the goose :

1) moving regularly from left to right
2) jumping from rightmost position to leftmost one (normal behavior of the goose)
3) goto 1)

Can someone tell me WHAT is the real behavior of an HP41 and an HP82143 printer for such a test ?

P.S. I know why I have different behaviors on those 2 emulators. I just want to know the real behavior