CFF2 variable fonts appear lighter on Chrome than Firefox and Safari

Hi everyone, web developer here so apologies if I use the wrong typographic terms. Also thank you for such a great open source typeface!

As title says, when using otf and woff2 variable fonts, the text looks lighter on Chrome, at the same font weights. This not only happens on my own website, but also on Source Serif demo page https://adobe-fonts.github.io/source-serif/. Please see screen shots below.

Note: the issue does not appear when using ttf variable downloaded from Google Font. I discovered this because I notice that the text on Google font page https://fonts.google.com/specimen/Source+Serif+4 looks the same across broswers.

**My website:**
On Chrome, font weight 400

On Safari, font weight 400

**Source Serif demo site:**
On Chrome, font weight at extra light

On Safari, font weight at extra light