Did it with <span> ... </span> now, I hope that initial caps now appear as intended. My own reader better arrives soon

In this post on the Sigil forum
italic and bold ok in sigil but not on Kobo reader
I see someone having problems with bold and italic text in sideloaded / ADE-rendered EPUBs on the KT (italic/bold text renders in ADE for PC, but not on the Kobo).

Can anyone confirm (or not) that error? My test EPUB contains both the updated initial caps and bold/italic text