thanks rattis,

I was suspecting the tablet. Wanted to rule out the other equipment. I don't think its a duplicate SSID.

The AP is back to factory defaults. AP already on current firmware. Checked these to be on safe side.

Reflashed the tablet.

Tablet seems to be stable now. I can give this a few days and try re-enabling wap in the cloud.

I'll keep everyone posted.

If this is a bug, is there a place to search or report it?

thanks