Issue network on KVM Windows

Hello,
I have a problem with my Windows KVM on Proxmox, the network connection stops from time to time although the network icon is on the connected state. This problem appears especially when copying from network shares, so each time I have to stop and start the VM to restore the network connection.
If I restart the VM without closing the console Proxmox, the machine starts but does not connect to the network, then I have to stop, close the console and start the VM.
Note: When the issue the ping machine on its IP address
Thank you in advance.