I have been seeing short periods of 100% CPU util on our 12 core, 2.5G processor. I see the JE2 workers as well and our JE2 has 2.1 billion queued jobs. I'm also working this through support.
Any updates on your ticket status Andy? I have been instructed to run some hotfixes and an update statement to my db but unfortunately it hasn't helped. Running the diagnostics with all services offline atm to shoot over with my fingers crossed.