Why shortcode block outputs as oneline textarea in 5.5.0?

[tntrex]

Describe the bug
I've just updated to 5.5.0 and find out that all my shortcodes blocks looks like one-line textareas. I use shortcodes to wrap large amount of content, for example, to add fragments of code in my blog posts. And now it looks like this: https://imgur.com/2JzvARD.jpg . Also even my small shortcodes now not fully showed in one-line textarea: https://imgur.com/eTAxm2t.jpg
It just looks terrible and frustrates me. Right now I just forced to downgrading to old version of plugin.

Expected behavior
It must shows all my content inside textarea. At least you can simply fix this with expanding textarea while it filled with content

Additional context

• Pull request with change of shortcode block look Fixed background grey of the Shortcode block placeholder screen #14719

[bobbingwide]

Oh my! It's atrocious.

[bobbingwide]

Let me specify my basic requirements for how it might appear.

• The shortcode block is basically a textarea where I can write shortcodes.
• But, unlike a paragraph block, I don't expect any HTML to be generated other than that created by the shortcode.
• Some shortcodes have many parameters so may be very long.
• Some shortcodes handle content between the start and end tags. These could also be very long.
• The textarea should therefore be expanded to fill the space available.
• As a sighted person the label is an unnecessary distraction.
• The custom HTML block (core/html) does not have a label.
• Nor does the preformatted block ( core/preformatted ).

[bobbingwide]

Here's an example showing a modified Shortcode block and Custom HTML and Preformatted blocks for comparison.

[aduth]

Possible regression of #14719 (cc @mapk)

[bobbingwide]

It appears that it was this commit that messed it up. aaa9e3a

[mapk]

Sorry folks. The field should expand with the text, or at least be expandable by dragging the corner. I'll try to get a PR going to solve this asap.

[tntrex]

Nice to see that fix was implemented. But how soon it will be available in plugin?