Time Series slider creates infinite null loop

Hey, I'm creating a time series chart with on the x-axis dates and on the y-axis a decimal value.  I added the range slider to look better at specific time periods. However when I change the slider a null loop starts a few seconds later. The log is looping the log node “Client” with the message “Null”, no error code or something is shown. I already tried to solve this by creating objects for the days that don’t have a value, these days have y-value 0. Does someone has an solution or is this a bug?
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