This is a bit weird. I have WCS running on Linux, version 5 and 6 have done the same thing where it will run fine but for no apparent reason the WLC will disable all the WLANs on the controller. This seems to happen across 4.x and 5.x controllers. If I go into WCS is shows the WLANS enabled, executing an audit shows the wlans are disabled and resyncing with the WCS db fixes it, but then it will happen a day or so later.
Anyone know why this is happening?