UI performance degradation

We are seeing serious UI performance degradation over time. To be clear we are doing/seeing the following:

1. Running version 1.3.0 container under Ubuntu 18.04
2. Accessing Label studio via port forwarding on host machine>
3. At first the UI performance is excellent.
4. Over time the UI becomes almost unbearably slow. This includes trying to go to the next task, typing the actual annotation, the UI basically becomes very unresponsive (though not totally dead)
5. Restarting the browser (in this case Firefox) solves the issue. We do not restart the label-studio container.

The current project contains ~3500 time series tasks. Some of the time series tasks container time-series on the order of a few 100K samples. This is a sequence to sequence effort, the annotations can be quite long.