Volcano thumbnail not loading

[asizemore]

Seen on both qa and prod.

To reproduce, create a volcano plot, then go back to the thumbnail list. The first time we see the thumbnail is missing.

Open the volcano plot again, go back to thumbnail list. The thumbnail is back!

But why?

[asizemore]

Update: Found the issue is that the currentPlotFilters are getting set to undefined, but they should be []. Not sure why/where/how yet.

[asizemore]

More info - when the full screen component opens, visualization.descriptor.currentPlotFilters = undefined when it should be [].