Stereoscopic rendering issues with sub-presentations

Scenario 1 

Slide 1 - basic objects

Slide 2 - Sub-presentation (.uip) on a layer

Stereoscopy doesn't work on Slide 1.

Scenario 2

Slide 1 - Sub-presentation (.uip) on a texture of a rectangle

Stereoscopy doesn't work.

Scenario 3

Slide 1 - Sub-presentation (.uip) on a layer

Steroscopy works as expected.

Scenario 4

Slide 1 - Sub-presentation (.uip) on a layer. Also another layer with basic object.

Stereoscopy does only work for the sub-presentation layer.