Blocked by WordPress/gutenberg#26301.

Thanks for the collaboration 👍

I tested out this PR and it worked fine on WP 5.5 with and without the GB 9.2.1 plugin, also tested on WP 5.6 and it worked fine.

I did see an error when testing in 5.3, it looks like it is in the escapeRichText function, the lodash flow looks like it wants a function and you're passing in the content string, not sure why I only saw the error in 5.3 and not the others, seems like it should be the opposite 🤷‍♂️

lodash.min.js?ver=4.17.15:48 Uncaught (in promise) TypeError: Expected a function
    at lodash.min.js?ver=4.17.15:48
    at n (lodash.min.js?ver=4.17.15:5)
    at lodash.min.js?ver=4.17.15:63
    at index.js?ver=8ab3a5043761424bde13bbf7fc5fccfe:1
    at save (index.js?ver=8ab3a5043761424bde13bbf7fc5fccfe:1)
    at vt (blocks.min.js?ver=6.7.2:2)
    at kt (blocks.min.js?ver=6.7.2:2)
    at block-editor.min.js?ver=3.2.4:49
    at hooks.min.js?ver=2.6.0:1
    at lr (blocks.min.js?ver=6.7.2:2)

Here is a screen grab, run in WP 5.3, add block, save and reload editor:

Humm. For some reason it is getting imported as a module:

Oh, well it's trying to import escapeEditableHTML from @wordpress/escape-html, but in WordPress 5.3 this was not yet introduced yet: https://github.com/WordPress/gutenberg/blob/%40wordpress/escape-html%401.5.1/packages/escape-html/src/index.js

Still, I thought that importing a non-existent function would result in escapeEditableHTML being null not a module.

I did see an error when testing in 5.3, it looks like it is in the escapeRichText function, the lodash flow looks like it wants a function and you're passing in the content string, not sure why I only saw the error in 5.3 and not the others, seems like it should be the opposite 🤷‍♂️

@mkaz How's this work for you now after 061d147?

@westonruter Latest change works for me both in WP 5.3 and WP 5.6 👍