wp:pattern block inside a block pattern with the same slug are linked when the block pattern is inserted

[ChrissiQ]

I don't know if this is intended or not but I'm confused by it.

I created a block pattern named mynamespace/glossary-group. Then I created a new block pattern named mynamespace/glossary-list which includes 4 instances of <!-- wp:pattern {"slug":"mynamespace/glossary-group"} /-->. When I insert the mynamespace/glossary-list, the 4 instances of mynamespace/glossary-group are linked. When I select one, all of them are selected. When I edit the content inside one, the content inside the others is linked.

Then, once the page is saved and editor reloaded, they are no longer linked.

Is this intentional? Can I make the multiple instances of the same pattern inside a block pattern unlinked somehow?

[talldan]

@ChrissiQ Thanks for mentioning this. It looks like a bug.

When multiple pattern blocks use the same slugs, the blocks that are created all use the same block ids (clientIds), so this weird behavior happens.

Kudos to @aaronrobertshaw for talking it through with me and spotting the issue!

[talldan]

I've created a bug report here - #50628.

And a fix here - #50629

(edit: now merged)