Font-size for existing content in first Quill editor isn't taken

[carsonbaker]

I'm re-submitting issue #3062 as it was closed for completion without being fixed. The bug still presents in Quill 2.0.0.

Issue #3234 duplicates the bug and was also closed.

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When existing content is provided to several quill editor instances, the font-size property of the text is removed on the first Quill editor, even if the value is present in the Size.whitelist.

Steps for Reproduction

Visit https://jsfiddle.net/9cur3dmx

Expected behavior:

The font sizes should be the same in both editors.

Actual behavior:

Observe that the font size in the first Quill editor is different than the second.

Platforms:

Chrome 83.0.4103.61, MacOS
Chrome 122.0.6261.94, NixOS

Version:

Affects all Quill versions, including Quill 2.0.0, and 1.3.7.