Recently, when back-testing strategies with multiple assets I have experienced the following issue with the newest Zorro version from the download page:

When I start a new strategy file and plot some graphs for the various assets everything seems to work fine. Then after I close zorro and later return for a new session, the script does not perform my plot commands any more (it only shows the first default candle plot of the most recently selected asset). Obviously, the code is still the same between shutting down and restarting. Therefore, since it was plotting just fine before shut down, I am certain that this is not an issue with my code.

I have experienced this issue twice already, starting new strategy files and then finding that they won't plot anymore after I shut down and come back.