Free orders are considered fully paid and should be autovalidated

makes sense.. thank you! I hope that I can find time to test the patch soon.. at least the patch reads correct

Thank you for this patch. This is helpful for free orders. I have tested this and it does not work because free orders (in my case) does not have any payment state. This patch seems to work only if

+    ->condition('co.total_price__number', 0)
+    ->condition('cp.state', 'completed')

It's inside an or condition

Thank you for the clarification. I could not apply this patch since this patch is only for version 2.x-dev. Is it possible to change this version to the latest version 2.0.1?

Why did you use a leftJoin() @Rhezios? Leaving join() makes more sense imho

@nchin - I've committed the patch from #2

So you can try the latest dev release without patching.

Although the change is tiny and looks 100% logical and correct, I haven't actually tested the change. So I think, I'll wait with a tagged release