Error in SYSLOG when stopping OpenVPN Server 2

[GSpock]

Hi Folks,
I am getting the following error on my RT-AC87U 384.13_8 when stopping OpenVPN Server 2:

Apr 28 10:33:03 rc_service: httpd 252:notify_rc stop_vpnserver2
Apr 28 10:33:04 ovpn-server2[2340]: Closing TUN/TAP interface
Apr 28 10:33:04 ovpn-server2[2340]: /usr/sbin/ip addr del dev tun22 10.9.0.1/24
Apr 28 10:33:04 dnsmasq[7053]: failed to send packet: Bad file descriptor
Apr 28 10:33:04 dnsmasq[7053]: failed to send packet: Bad file descriptor
Apr 28 10:33:04 dnsmasq[7053]: failed to send packet: Bad file descriptor


Any ideas/suggestions ?
Rgds,
GS

N.B. no such messages when stopping server 1 (server 2 is TUN/TCP 443)