Windgets number one priorty is design. It aims to bring a minimalistic, modern, and clean feel to your desktop.
Unfortunately on startup, with the executable in shell:startup, it is delayed before most people open apps. So if you are one to quickly open apps when your pc starts, theres a chance that the widgets will start on top of your currently open window and not your desktop.
If this happens the best solution is to do Win + M and then quickly after do Win + Shift + M. This forces all the windows to minimize, then to reopen, which pushes the windgets to the back.