GL-B1300 OpenVPN client randomly stopped working

Completely puzzled by this I didn’t know if anybody else has had a similar situation I’m currently using flow VPN on my router with a opvn file config with openVPN client I’ve been using the service for over a year consistently and haven’t had any problems til now for some weird reason randomly out of the blue it just stopped working

Updated the opvn file I even completely flashed and firmware the unit V3.027 / V3.022 tested 3.1.02 / 3.1.03 / 3.1.04 I understand the unit is running openwrt 15.05.1 r48067 even stuck openwrt 19.07.3 still no joy I’m wondering if it’s because it’s open source didn’t know if some of the components got updated in a firmware push I’ve even tried it with a second B1300 I can replicate the problem on that one too

Tested the same opvn file on tunnelblick and other services to Flow VPN it works fine, reached out to Flow VPN technical support multiple times but they have not responded back

From system logs

Sun Jul 26 13:52:52 2020 daemon.warn openvpn[23601]: WARNING: No server certificate verification method has been enabled. See http://openvpn.net/howto.html#mitm for more info.
Sun Jul 26 13:52:52 2020 daemon.warn openvpn[23601]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Sun Jul 26 13:52:53 2020 daemon.notice openvpn[23601]: TCP/UDP: Preserving recently used remote address: [AF_INET]194.146.24.107:1194
Sun Jul 26 13:52:53 2020 daemon.notice openvpn[23601]: Attempting to establish TCP connection with [AF_INET]194.146.24.107:1194 [nonblock]
Sun Jul 26 13:52:54 2020 daemon.notice openvpn[23601]: TCP connection established with [AF_INET]194.146.24.107:1194
Sun Jul 26 13:52:54 2020 daemon.notice openvpn[23601]: TCP_CLIENT link local: (not bound)
Sun Jul 26 13:52:54 2020 daemon.notice openvpn[23601]: TCP_CLIENT link remote: [AF_INET]194.146.24.107:1194
Sun Jul 26 13:52:54 2020 daemon.warn openvpn[23601]: WARNING: ‘link-mtu’ is used inconsistently, local=‘link-mtu 1543’, remote=‘link-mtu 1323’
Sun Jul 26 13:52:54 2020 daemon.warn openvpn[23601]: WARNING: ‘tun-mtu’ is used inconsistently, local=‘tun-mtu 1500’, remote=‘tun-mtu 1280’
Sun Jul 26 13:52:54 2020 daemon.notice openvpn[23601]: [server] Peer Connection Initiated with [AF_INET]194.146.24.107:1194
Sun Jul 26 13:52:56 2020 daemon.notice openvpn[23601]: TUN/TAP device tun0 opened
Sun Jul 26 13:52:56 2020 daemon.notice openvpn[23601]: do_ifconfig, tt->did_ifconfig_ipv6_setup=0
Sun Jul 26 13:52:56 2020 daemon.notice openvpn[23601]: /sbin/ifconfig tun0 10.8.0.2 netmask 255.255.255.0 mtu 1500 broadcast 10.8.0.255

Opvn file excluding the cert

client
remote dc1.uk.flow.host 1194 tcp
dev tun
sndbuf 0
rcvbuf 0
socket-flags TCP_NODELAY
auth-user-pass
#auth none
#cipher AES-128-CBC
verb 1
connect-retry-max 5
connect-retry 5
resolv-retry 60
persist-key
persist-tun
#tun-mtu 1280
#mssfix 1200