I refuse to be kindā¦ but the file looks fine anyhow:)
@gdon_2003ās comment regarding the bit slipping is definitely something to seriously consider. Iāve had this happen with a faulty 6mm collet and it went directly through the stock to the wasteboard in about 50mm of horizontal travel.
Your surfacing bit is presumably a new bit you havenāt used before, and perhaps it needs to be tightened a little more firmly?
Also, if (for example) itās a 6mm shank and youāve a 1/4" collet it will feel like itās in place but wonāt be. Other things that might affect grip are dust in the collet or some sort of lubricant on the bit or shaft.
Note that you can always do a dry run with your pattern. Put something else in the router, even a pen or pencil (donāt turn it on in this case), then zero and back off the Z axis by 0.5mm and rezero.