On Blackgate, my guild got both Sotzz the Scallywag (Gendarran Fields) and Yanonka the Rat Wrangler (Fields of Ruin) We had a group of 20 in Gendarran, and a couple in FoR and we couldn’t find any Suspicious Barrels or Suspicious Rats. This is a new issue, because we were able to find both on Sunday, so this is recent as of the patch today.
I’m not sure if maybe we’re just a bunch of idiots, or if it’s server specific, or game-wide.