Try a true epub3 reader on your mobile. Thorium (by the folks at Readium) is a good one for your Desktop, so I would try Readium Mobile.
https://www.edrlab.org/software/readium-mobile/
They have versions for Android and iOS and are based on much of the same codebase as Thorium Reader.
Many other epub Readers are based on Readium and a full list can be found here:
http://readium.org/awesome-readium/
So download some of those and try them until you get one that works.
On iOS you could try the Books (iBooks) app as well.