LightBurn 1.4.00 - undo of node editing not working correctly after update

With latest version of LightBurn, undo action when using node editing is not working always.

Steps to reproduce:

create new file
draw some primitive shape, e.g. rectangle
convert shape to path
go to node edit and move any point, click undo (in most cases first undo action is working)
move again any other point and click undo - now undo is not working
If I try to move other points after above step, sometimes I can undo all previous moves, sometimes not.
After reverting to 1.3.01 all is working OK.