I had the same issue with 100% loss and 1000ms after a factory reset + restore backup. (was working before)
Then I have tried to ping my wan, which failed:
root@Void:~ # ping -c 1 x.x.x.x
ping: socktype: SOCK_RAW
ping: socket: Operation not permitted
ping: => missing cap_net_raw+p capability or setuid?
ls -la $(which ping)
-rwsr-xr-x 1 nobody root 140900 Jun 5 2025 /usr/bin/ping
So I just changed it to root, which solved the issue for me.
chown root:root $(which ping)
ls -la $(which ping)
-rwxr-xr-x 1 root root 140900 Jun 5 2025 /usr/bin/pingroot@Void:~ # ping -c 1 x.x.x.x
PING x.x.x.x (x.x.x.x) 56(84) bytes of data.
64 bytes from x.x.x.x: icmp_seq=1 ttl=255 time=3.59 ms
Looks good now.