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plotting - Possible bug in ListDensityPlot in Mathematica12


Bug introduced in 12.0.0



I'm having some problems with ListDensityPlot in Mathematica 12 on MacOS Mojave.



Here is the code:


test = Import["https://www.dropbox.com/s/0ypdo4pdh9q86j5/test.csv?dl=1"];
ListDensityPlot[test, PlotRange -> All, InterpolationOrder -> 0]

(data can be found here: https://www.dropbox.com/s/0ypdo4pdh9q86j5/test.csv?dl=0)


Output in MMA11.3



enter image description here



Output in MMA 12




enter image description here



In v12 there are a lot of unwanted triangles in the plot. Any idea of what the problem might be?


EDIT: I forgot to mention that the problem "disappears" with any value different than 0 assigned to InterpolationOrder.


EDIT 2: It actually seems to be a genuine bug, so I added the bugs tag and reported to mathematica support.




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