Hutchinson Sector 28s sketchy in the wet?

I’ve been using these for a few weeks now, and today was the first specially wet day.  Back tyre slipped out coming down a steep hill that I descend every day.  I was just able to hold it, but finished up pretty much in the opposite gutter.  Had a couple of minor slips on the way home, including climbing the same hill.  

Has anyone else found this?  If they are as bad as this, then they may have to go, so any other suggestions for 4 seasons tubeless?

Thanks