The copy to clipboard icon on code blocks is not displaying correctly

[marc1404]

What happened:

The copy icon of the copy to clipboard button on code blocks is not displaying correctly.

What you expected to happen:

The copy icon should be displayed correctly.

How to reproduce it (as minimally and precisely as possible):

1. Open any documentation page on https://gardener.cloud that has a code block, e.g. https://gardener.cloud/docs/gardener/project/namespaced-cloud-profiles/
2. Look at the copy to clipboard button at the top-right corner of the code block.

Anything else we need to know:

The Docsy code that generates the button and icon lives here:
https://github.com/google/docsy/blob/main/assets/js/click-to-copy.js

However, the code was changed last ~2-3 years ago.

A potential fix (like shown in the expected screenshot) is to create an <i class="fas fa-copy"></i> child element of the copy button.
As Docsy controls this code, this fix is not easily applied, suggesting the issue might lie on our side.

Environment:
https://gardener.cloud

Browsers: Latest MS Edge, latest Google Chrome