Streaplots with multicoloured lines bug

[strangeflavoured]

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Streamplots with multicoloured lines arent properly coloured when the tikzplot is created. I solved the issue by adding the following snippet to _line2d.draw_linecollection (has to be before edgecolors = obj.get_edgecolors()):

obj.update_scalarmappable()

I'm not sure if it solves all cases or there are similar issues elsewhere, but this worked for me!