Did this work for you?

@vladisld Were you able to resolve this issue? I have one strategy and two stocks. I don't see any hang or anything, but next() only runs for one of the stocks.

@shspersonalwork I know the following about preload, however I want to know the impact of this setting on Live and Offline mode, and how did you debug the problem to this parameter setting?

"preload -> Whether to preload the different data feeds passed to cerebro for the Strategies"

@vladisld Could you please explain what preload=False do, and when should we set it to True and False when we are using the interactive broker?