It appears that you are using a continuous contract?? Have you tried pulling up a chart for just ESZ3 and see if it still happens?
Just trying to narrow it down / troubleshoot possible scenarios
I already have "Save Live Ticks" enabled. If you mean "Clear local data" to reload history then I did it multiple times, but the result is always the same.
Rithmic is a funded company connection, but currently running on the Rithmic papertrading server. I've seen people using MW with this company, so I think its really OS related.