@kienstra Even if this doesn't resolve #270, it does resolve a problem for users with a different Site URL and Home URL. See WordPress/gutenberg#1761.

Looks Good
Question About Where This Should Be Fixed

Hi @lukecarbis,
The code looks good, but do you think Block Lab is the right place to fix this?

You understand this issue better than I do. But in that issue you linked to, it looks like this affects the block editor and the REST API, not just Block Lab: WordPress/gutenberg#1761 (comment)

Given the impact of this issue was a deliberate design decision for the REST API...

It'd be interesting to see how this works for @MattKevan, or if he had this issue with the block editor in general, or only this plugin.

@kienstra I agree that block lab might not be the right place for this fix.

Try reproducing by changing the domain in the URL (not just the path).

Given that this is an issue that affects all dynamic blocks (in fact, any block that makes a REST API call), I'm going to suggest we allow the fix to come from the Gutenberg team.