Escaping quotes in styles

I’m using your fabulous theme and for past year I have no problems with it. Right now, I have found one tiny glitch.

I’m using one of WordPress JetPack’s features to enable “Edit CSS” item in “Apperance” menu and to be able to inject custom CSS code. JetPack injects it in <style id=”custom-css-css”></style> section.

For some reason your theme causes quotation marks (both single and double) to be escaped in CSS styles injected in this way. This causes that all CSS styles, that uses quotation marks (i.e. font, content, url etc.) to be ignored by browser, because it ends up in page’s code like:

li::after{content:\”|\”}
h6{font-family:\’Roboto Condensed\’, sans-serif}

I’m pretty sure, this is caused by your theme, because I’m observing this effect on both my blogs, where I’m using your theme and there is no sign of this problem on remaining ten blogs, where I’m using the same set of custom CSS styles, but different WordPress theme.

Thank you in advance for any assistance here.