OS: Chrome 
Version 63

If you get to an italicized word, Select to speak does not read the normal words after that in the line. Instead, it skips to the next line, so you just miss certain text. See an example in the first paragraph here: https://wearyourvoicemag.com/more/entertainment/the-problem-with-priyanka-chopra-south-asian

(Please excuse the random article example). 

We need to make sure that reading is continuous throughout that full line and that it smoothly continues to the next line without pausing.