wpa-psk help with output of ifconfig ?

Hello,

I'm trying to debug some problems using WPA-PSK with ral driver.
Connection is often hanging after a while, network down.
netstat -r takes a very long time, ping doesnt respond, etc...
it works if I reset everything with netif restart.

I saw a difference in the output of ifconfig that seems to be connected :
working state :

ral0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet6 fe80::216:b6ff:fe5d:93f9%ral0 prefixlen 64 scopeid 0x2
        inet 192.168.0.100 netmask 0xffffff00 broadcast 192.168.0.255
        ether 00:16:b6:5d:93:f9
        media: IEEE 802.11 Wireless Ethernet autoselect (OFDM/54Mbps)
        status: associated
        ssid ruomad channel 9 bssid 00:11:95:f0:8f:21
        authmode WPA privacy ON deftxkey UNDEF TKIP 2:128-bit txpowmax 100
        bmiss 7 protmode CTS roaming MANUAL bintval 100

not working :
ral0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet6 fe80::216:b6ff:fe5d:93f9%ral0 prefixlen 64 scopeid 0x2
        inet 192.168.0.100 netmask 0xffffff00 broadcast 192.168.0.255
        ether 00:16:b6:5d:93:f9
        media: IEEE 802.11 Wireless Ethernet autoselect (OFDM/54Mbps)
        status: associated
        ssid ruomad channel 9 bssid 00:11:95:f0:8f:21
        authmode WPA privacy ON deftxkey UNDEF TKIP 2:128-bit TKIP 3:128-bit
        txpowmax 100 bmiss 7 protmode CTS roaming MANUAL bintval 100

The issue seems to be the TKIP 2:128-bit TKIP 3:128-bit (two items) when
prevously there was only one...

Does anyone know what this output means ?

Thanks in advance

bruno