Epub Font issue

[mariap83871840]

When I export a fixed layout epub from InDesign, the font is inconsistent depending on the reader.  I am using Myanmar Text for the headings and Calibri for the body text. Version InDesign CC 13.1 on Windows.  I am using character and paragraph styles throughout.  Early test exports were fine, but the final is a mess in Adobe Digital editions but fine in Readium. See below.  Why is this happening?

Adobe Digital Editions 4.5.8

Readium for Chrome - displays perfectly

[Steve Werner]

Moving to InDesign EPUB forum

[BobLevine]

That is one of the symptoms of subpar epub readers.

My thoughts: https://www.boblevine.us/the-fixed-layout-epub-missing-piece-reliable-readers-for-windows-and-android/