Small hobby home laser engraver .....engraving issue ....laser turning on late

Hi
i have a home hobby low powered laser engraver similar to the elksmaker style....it was 2000mw and perfectly fine worked fine but today i upgraded to,a 5500mw laser module...it,was,a,simple,swap

With new laser module,when i run a program the machine,starts and moves the laser fan turns on as soon as program syarts but the actual,laser turns on a few seconds later so entire image is not engraved...after laser turns on it finishes the image fine but the first part of image is not engraved,since laser turning on late

it does this every time...

any ideas why?

nothiing was changed to the machine other than swapping out laser module