Okay, I cut Bazzil a lot and don't find too many problems, I also cut AC cardstock which is super to cut. I do always test cut (on the cut page click test (bottom right of the cut panel) and the machine will cut a little triangle in the corner of the card - apologies if you already know this - and you can see if it cuts through without wasting card). You could update to the latest stable software v 4.2.279 here: https://www.silhouetteamerica.com/software , you could also check the packet size you are using - go to top right hand side of your Studio screen > edit > preferences > advanced and if your packet size is still the default auto (1000 bytes) change it to 500. You could also ring Graphtec and run the problem past their tech folk if nothing has helped, Graphtec are super helpful.

Andi