I’m happy to state that this issue should be resolved now in the latest 4.1.0 release. Our team successfully tested two factory files from threads mentioning this issue as well as many other large models to ensure this works better in the future. We were able to import and slice models with 40 million triangles and up. This was just one of many improvements to the software. All of which are detailed on our Release Notes page
Thank you for your help reporting this issue!