ViewCaptureToFile Raytrace, restarts from first sampling

Hmm… I let the Raytraced Viewport run it’s sampling for about 3000passes out of 6000 I set as max.
Then ViewCaptureToFile with background transparent with sampling of 2800, and the rendering is starting from scratch.
And takes quite a long time…I wish I can pause and let it save at that sampling…

Anyway, I’m sure it was an instant saving before…

anything changed?