Missalignement and unwanted lines

I have a Laserpecker 4 running with the latest Lightburn version and G-code controller (GRBL 1.1 or earlier).

I endraved a name on a glace with the rotary extension, but the laser did not turned off between the letters resulting in undesired lines engraved between the letters.
Also I need to recalibrate the origin before each engraving (home 0,0) and even though the engraving starts sometimes with a misalignment on x axis (~6mm).

I did not have these issues before updating lightburn. The set up did not change.

Check this on documents: