Splashscreen based upon device idiom not working on iPad Pro/ iPad Air (2)

The following code works like a charm:

<splash src="res/screen/ios/Default@2x~universal~anyany.png" />
<splash src="res/screen/ios/Default@2x~universal~comany.png" />
<splash src="res/screen/ios/Default@2x~universal~comcom.png" />
<splash src="res/screen/ios/Default@3x~universal~anyany.png" />
<splash src="res/screen/ios/Default@3x~universal~anycom.png" />
<splash src="res/screen/ios/Default@3x~universal~comany.png" />

But if I specify the device idiom like the following:

<splash src="res/screen/ios/Default@2x~iphone~anyany.png" />
<splash src="res/screen/ios/Default@2x~iphone~comany.png" />
<splash src="res/screen/ios/Default@2x~iphone~comcom.png" />
<splash src="res/screen/ios/Default@3x~iphone~anyany.png" />
<splash src="res/screen/ios/Default@3x~iphone~anycom.png" />
<splash src="res/screen/ios/Default@3x~iphone~comany.png" />
<splash src="res/screen/ios/Default@2x~ipad~anyany.png" />
<splash src="res/screen/ios/Default@2x~ipad~comany.png" />

I do not get any splashscreen on the iPad Pro and the iPad Air 2.