Screen reader does not read contents on first (starting) slide

I'm building a module that needs to be fully accessible. It's a fairly basic and linear module, with a menu on the top (the first items to be read). I have set the screen reader visibility on required elements on the slides, as well as Alt Text for some. I used 2 screen readers: NVDA and Thunder Storm.

Here are my issues:

  • The contents are not read at all in Chrome.
  • The contents of my first (starting) slide are not read in Firefox. As soon as I go to another slide (either from menu or next button), the contents are read correctly. When I go back to the first first slide, the contents are ten read correctly also.
  • IE reads all contents correctly right on the first slide (with the first tab)

Is there anything I can do to fix the Firefox issue?

Thanks,

Justyna

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