I don't know about IB, but in using MBT I noticed that this only occurs if I am connected during the 12:00AM server reset. Other than that my charts continue to update.
After I lose connect to my broker I close NT. I then open NT around 12:05AM when I know my broker has finished their server reset. This has worked for me for the past week that I've been doing it.
Just a thought.
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