Within a couple of weeks, we’ll promote the latest Slicer Preview Release to become Latest Stable Release and extension updates for the previous stable release will stop. So, it is important to investigate and fix any problems in the preview release.
Most likely the crash has been fixed already, but just in case you can reproduce a crash with the very latest Slicer Preview Release then please describe the steps that you did. Your description above was quite good but without having your .mrb scene file the information was insufficient.