[Mesh] missing arrows with Multiple blending mode when exporting to PNG

[qgib]

Author Name: Saber Razmjooei (@saberraz)
Original Redmine Issue: 21027
Affected QGIS version: 3.5(master)
Redmine category:symbology

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https://lists.osgeo.org/pipermail/qgis-developer/2019-January/055829.html

[qgib]

Author Name: Pedro Venâncio (Pedro Venâncio)

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I confirm this one, but not only with Multiple blending mode. It also happens with Darken.

And it only happens when the arrows are with white color (rgba( 255, 255, 255, 1.00 ) / #ffffff).

[Pedro-Murteira]

@saberraz Hello, is this issue still valid on more recent releases?

[saberraz]

ping @pcav

[github-actions]

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[github-actions]

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