Existing tags sometimes missing in the sidebar

[afercia]

To reproduce:

• open in Gutenberg an existing post that's already using some tags
• open the sidebar and open the Categories & Tags
• depending on the cases, some tags may appear correctly, others not

I get this warning in the console:
Encountered two children with the same key, token-. Child keys must be unique; when two children share a key, only the first child will be used.

In my case, the tags are:
alignment, captions, content, css, image, markup
and their slugs are:
alignment-2, captions-2, content-2, css, image, markup-2

[youknowriad]

Does's this PR solve this issue #1093?

[jasmussen]

This seems to be an issue also for categories.

[youknowriad]

Can't recall in which PR but this is fixed for me

[afercia]

@youknowriad maybe #1490 ?

I see the PR mentioned an issue that, as far as I know, is still to address: "For the categories selector, we'd have to rewrite completely (maybe with virtual scroll, something like Calypso) to load paginated categories". Don't think there's an issue about that, do you want me to create one?

[youknowriad]

@afercia Sure 👍 Thanks