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The multithreading function responsible for refreshing the matplotlib charts will occasionally combine the values of the charts when under high CPU load and prompted multiple times for the "next" chart.

Easily reproducible, ensure CPU is at maximum load and attempt to rapidly change the selected plot while the plots are currently refreshing.

Results in a minor temporary visual issue until the plots are again refreshed.

It appears that the multithreaded function which regularly updates the matplotlib plots occasionally/randomly crashes silently.

This could be due to a number of potential causes that relate to the logic itself, issues with qthreads spawning additional threads, or potentially a segfault.