I am also facing some issues / differences on 4.1 and 4.2 beta:
- when acting as wireguard server, doesnt respond to DNS request from inside WG tunnel. (WG not working when I set DNS = 10.0.0.1 (WG server IP) in the WG client conf. This worked fine in 3.x.
- cant reach the WG server inside the tunnel via https, although I enabled HTTPS Remote Access (this should be for WAN) and also allowed 443 in Network → Firewall → Open ports on router. Did the same for DNS.
this also worked fine in 3.x as far as I remember
- also had some issues when tried downgrading back to 3.x - router crashed - so now I am back on 4.1 (had to use the process explained above)
maybe I am missing something?