I also encountered the update issue. I had the next situation happen to me just now:

- Had Bot 1 active trading BTC/USD for several hours. Bot 2 was simply capturing BTC/USD data with a different update timer (doing some benchmarks there).

- Changed Bot 2 to LTC/USD since I saw some interesting movements. The graph did not update, it still displayed BTC/USD with the previous data. Changed timers and nothing changed aswell. Bot 1 was not touched at all during all this period. Some time later (don't know exactly, but more than 20sec. I'd make a wild guess at 1-3min) I find BOTH bots' data reset, which was quite annoying. Bot 2 started displaying the proper graph obviously, but at the cost of resetting Bot 1 when it shouldn't have had. I didn't do the Settings trick to refresh when I changed bot 2 precisely because I didn't want to lose data on Bot 1, so it happened by itself. Hopefully you can reproduce it with this explanation.