This is a problem that has just started happening to me. Maybe had a total of 5 disconnects in a year plus on site but always able to get right back on.
Last 2 days I lost connection during challenge matches, but it was not my internet. I could connect to every other site I tried just not WGT. Then magically after the 5 minutes are up I could get right back in. Very maddening. Cost me 800 credits.
Caches cleared and all that jazz. Tried several different browsers too. All would connect to any site but WGT.