Gutenberg Plugin 11.0.0 - Editor changing line-height and color, not WordPress's default

[cngodles]

Description

The Block Editor font has had its line-height and color altered from its default. There appear to be modifications in reset.css that affect the editing experience only when the plugin is enabled. This is affecting at the very least the Paragraph, the List, and perhaps the Header block.

reset.css seems to be effecting the color

And the line-height.

I originally reported this in #30046 with the primary callout being the displayed font. That appears to have been corrected, however since the line-height and color are still an issue, I am opening up this separate issue.

When I deactivate the plugin, the fonts show correctly.

Here are Chrome's computed values for the paragraph block. The enabled plugin (top) vs the disabled plugin (bottom).

Step-by-step reproduction instructions

1. Update/Enable Gutenberg Plugin 10 (10.4.1)
2. Open the WordPress Gutenberg editor for any page or post.

Expected behavior

The values for line-height and color should be the same as the WordPress 5.7.1 experience, without the Gutenberg plugin installed and enabled.

Actual behavior

Fonts are appearing using the default system serif font.

WordPress information

• WordPress version: 5.7.2
• Gutenberg version: 10.6.2
• Are all plugins except Gutenberg deactivated? No.
• Are you using a default theme (e.g. Twenty Twenty-One)? No. Using the Dollah Theme.

Device information

• Device: Desktop
• Operating system: Windows 10
• Browser: Chrome Latest. Version 92.0.4515.107 (Official Build) (64-bit)

[cngodles]

Retested in 10.6.2, the issue still exists.

[skorasaurus]

still exists in 11.

[cngodles]

I'm going to say that this has made it into WordPress 5.8. I am running into this on two very different installs. One has the template I originally described, the other is a custom template that makes no use of any sort of special font formatting.

This issue now occurs without the plugin enabled. It's a highly critical degradation of the intended Gutenberg editing experience.

line-height

I am getting this line-height, which I think takes away from the WordPress editing experience the most.

The original editor-style line-height was the 28.8px style, which I felt was the heart of the default Gutenberg editing experience.

color

Also the color. It has been set to rgb(0,0,0), whereas the original experience was rgb(30,30,30).

[cngodles]

This is fixed by #34439. The problem still exists in the core, but it looks like a solution is coming with 5.9.