Web interface clobbers encryption settings

I am running wireless interfaces on my router with the following parameters

authentication-types=wpa-psk unicast-ciphers=tkip group-ciphers=tkip

If I log into the router using the web interface and do anything, even just clicking on the links associated with an interface but not changing anything, these parameters get clobbered and become

authentication-types=wpa-psk unicast-ciphers= group-ciphers=

This, of course, kicks all my wireless clients offline until someone reports the problem and someone here goes back in via telnet or Winbox to fix it (the web interface can’t fix it).

Is there something I can do to stop the web interface from clobbering the security profile? (I know “stop using the web interface” is probably number one on the list, but a fix would be nice.)

Resolution: webfig greatly improved by MikroTik, doesn’t have this problem anymore.