The historical data, which is loaded after the initial connect, gets lost when switching to a different instrument. The number of items displayed in the Historical Data window is still correct.
YM 12-16 -> ES 12-16 -> YM 12-16
I added the line in the image between Nov 2 und Nov 3, almost the complete Nov 2 is lost.
Importing the historical data manually fixes the charts.
Connection ist Interactive Brokers, Timezone is central european.
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