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
Oh my! It's atrocious.

Let me specify my basic requirements for how it might appear.
Here's an example showing a modified Shortcode block and Custom HTML and Preformatted blocks for comparison.

Possible regression of #14719 (cc @mapk)
It appears that it was this commit that messed it up. https://github.com/WordPress/gutenberg/pull/14719/commits/aaa9e3ac54d904ff96a97d4a9370d52b27f1b506
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.
Nice to see that fix was implemented. But how soon it will be available in plugin?
@hustlahusky It should be available as of the Gutenberg 5.8 plugin release, scheduled for tomorrow (Wednesday, May 28).
For future reference, if you look to the pull request, it should typically be assigned into a release milestone, visible in the right sidebar.
See #15365
