USB modem connection issue on PC

Hello, for the past few months, when I connect my phone (Galaxy S8 GM-950F) as a USB 4G modem to my PC, the connection works very well for about ten minutes, then it goes limited on the PC for no reason, and I have to restart my PC to be able to share again via USB modem (only to end up having the same issue).
This never happened to me before; everything worked very well without interruptions or bugs, and I can't see where the problem comes from.