I have tested the sample.epub (after fixing the extra . typo in the css stylesheet) on macOSX with Sigil 1.7, 1.6, 1.5.1, 1.4.3, 1.30, and 1.2.0 (1.2.1 was a linux only source release) and it always shows the text on opening in blue bold.
So whatever the issue is, it is Linux specific and maybe even SuSE specific. My quess is it is QtWebEngine related.
If it worked on SuSE Leap 15.1, what version of Sigil was that? Could this be related to the move from QtWebKit to QtWebEngine after Sigil-0.9.14?
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