Why does the browser sometimes not display some of the Myriad Pro font letters or all of the text?

Question

css

Hello!
Sometimes when displaying a page in the chrome 49.0.2623.112 m browser, either some characters of the Myriad Pro font are not displayed, or completely in the entire block. The problem is floating and appears for some unknown reason. It is impossible to specially generate it, I launched and closed the page many times. Refreshing the page with disabling the cache does not help, the page remains with the same jambs. When I look in the inspector, I see that the text is actually present in the block. For example: I have font-size: 14px and nothing is displayed. I put in the inspector font-size:17px, then the text appears, at the appropriate size of 17px. When moving from page to page, in the current browser tab, the problem with displaying the font remains. But if this page is already loaded in a new tab, then the problem disappears, i.e. the page is displayed normally. I have an assumption that the problem is in the browser, because. it is very strange that sometimes only some letters are not displayed, for example, o and a. Such a jamb pops up very rarely and it is not clear for me only or for someone else it will be so.
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Now the same problem popped up in Opera, so it's unlikely that the problem is in the browser.
There may be a problem with windows and the font.

Answer 1

Try setting the text value to pt and adding a font for the body. Itself with such not when, did not face.