Gutenberg editor: paragraph toolbar unusable in Cover blocks in Column blocks when multiple columns present

[andreabadgley]

Steps to reproduce

1. Start in the Calypso block editor for a page or post with any theme enabled: https://wordpress.com/block-editor/page/
2. Add a column block with 3, 4, or 5 columns (this error also occurs in the edit screen for some themes when only 2 columns are present)
3. Add a cover block to one of the columns
4. Click into the paragraph block to add words and potentially edit them, for example, to add a link.

What I expected

I expected to have a full toolbar to edit the words on the cover block:

What happened instead

The toolbar is obscured by the next column to the right when multiple columns are present, rendering options like B, I, linking, and additional options unusable.

Browser / OS version

Screenshots from Chrome 78.0.3904.108 on MacOS Catalina 10.15.1. This also happens in the desktop app and in Firefox 70.0.1.

Screenshot / Video

In Twenty Nineteen with three columns:

In Mayland with three columns:

In Bard Pro theme with two columns:

Context / Source

Originally raised by a #user-report in live chat in 16401673-hc. I notified them I would follow up in 2528348-zen if/when it's fixed.

[andreabadgley]

Another report of this in 17465052-hc.

Workaround: Expand column to full width in order to access toolbar to make formatting changes to text. When finished, click reset for the column width.

[stale[bot]]

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