I installed wireguard vpn using https://github.com/Nyr/wireguard-install on the server and the server has been performing fine for 2 weeks now but today the speed that i get from the vpn server is kbps most of the times and back to normal 50-100mbps sometimes and it has been really annoying for the people using the vpn.Can you help me to solve the problem?I tried to restart the server several times and delete and create new vpn profile but does not help much.