After changing time range, no data

[gismo2004]

When changing the time range for a plot, an error message pops up, and no data available anymore.

When changing from e.g. "last 2 minutes" to "last 1 minute" it works, but changing back to "last 2 minutes" results in Streaming channel error: Subscription to the channel 1/ds/a8cojTcVk/200ms/coffee/Bricoletta/sensordata already exists