With Ruida, I like to use the ‘User Origin’ mode, and ‘Send’ from LightBurn, then from the machine control panel - position the laser, set the ‘Origin’, ‘Frame’ , then ‘Start’.
I have run into a few cases with ‘Current Position’ where the job did not start where expected.
How is the PC connected to the Ruida? USB or ethernet? If USB try switching to from the Serial/USB to the Packet/USB connection method and see if that makes a difference - or try changing to ethernet which is a faster file transfer.
But you should frame first to be certain anyway.
Some discussion here that might be helpful: