Hello, this might be due to the USB HUB chip wearing out over time. The VIM3 now offers a V15 version of the motherboard that addresses this issue, or you could simply replace the USB HUB chip with model FE8.1.
Could you please tell us where you buy the boards? You can contact our after-sales service for help on the platform or you just provide the platform information to us and then we can arrange the after-sales service for you.