I believe this started around v2.3.4.130 but not positive. The current 2.3.4.134 is supposed to have a fix for it, but many of us were still getting in.
I fell back to 2.3.3.138 (I didn't have 2.3.3.140) and not having the issue. Waiting for a new release with a real fix
Be patient. You made the right move from ST to HE. They are working on it and temporarily falling back to a previous version works just fine for now.
See here for more info Elevated and Severe Hub Loads with v2.3.4 - #174 by dJOS
