CSS Grid with insertCSS is not working

[developerpruthvi]

Electron Version: 1.7.9
Operating System: RHEL 7

Hi, recently I tried to inject Some CSS using insertCSS into a webview but it's not getting injected as expected. I'm sure that injection is happening but only CSS Grid styles are not parsed properly.
For example, the following CSS:

@media(min-width: 660px) {
  .main-nav {
    grid: 1fr / 100px 1fr 400px;
  }
}

was converted like this:

Any help is appreciated, Thanks.

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[sofianguy]

@developerpruthvi Thanks for reaching out!

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