I am finding Start10 quite stable and it offers many useful access tools. The disappearing icons on the Taskbar are not a major concern. Clicking on the Cortana icon sort of refreshes the taskbar and the Edge Browser and Task View Icon are then visible. Its not a constant issue for sometimes the icons are viewable.. I'm looking at this as a trade off.... Start10 offers a significant usability upgrade so the loss (part time) of some icons on the taskbar is easily tolerated.