Picture Story book: Text overlay in landscape mode is missing

We have been building multiple apps with translations of the “50 Bible Stories”.
The source (images+text) is prepared in Word. So far we have been adding Audio recordings also, and it was looking quite well in Landscape mode, with the image in full screen and the text overlaying the image. Both images and text were changed automatically while the audio was playing. See picture attached.

The issue is that text was appearing only when the audio was played.
There is one language that does not have audio recording, so there is no way to see the text in landscape mode. Only the images can be viewed.