Having a strange issue, i’ve run out of ideas. Help Appreciated 
So, we use our 4896pro to do all kinds of stuff, but mostly it cuts parts for cabinets (we own a custom cabinetry business). We use a cabinet design program called Mozaik to generate the g-code. So here’s the issue, when i run mozaik produced g-code, any part that requires hold down tabs is cut 1/4 smaller than required. When the machine cuts the tabs, it cuts them as though the part was made the correct length. It leaves an 1/8" tab on each end that, when measured, is the correct part length. All parts not requiring tabs, it cuts perfectly, and the machine cuts perfectly when using g-code produced by vectric.
So i take pictures and e-mail Mozaik support. Send them the project file as well as the g-code in question. While waiting to hear back i mull over the problem. It cant be that the machine is bogging down and losing it’s y axis reference, because it cuts them equally on both ends (not offset). To make double sure, i re-indexed the machine between the part cut and the tab cut and it still, same issue. I thought maybe mozaik thinks i have a different collet/spindle size than i do?
Well, Mozaik support emailed me back and said that they simulated my g-code and it worked perfectly, so its not their problem. I cant see how it isnt. I uploaded a picture to this post, hopefully it shows.
So i’m reaching out here, because i’m out of ideas. I cant get any info out of Mozaik support since it simulates fine, but obviously there is an issue. Does anyone have any advice? Or a place to look? I swear i’ll dance at your next wedding if you help me figure this out.