app.bsky.feed.searchPosts tag parameter not working

[alexmge]

It seems that the tag parameter of the app.bsky.feed.searchPosts endpoint doesn't do anything. At first I was working with the js Agent using this query.

const agent = new Agent('https://public.api.bsky.app');
const response = await agent.app.bsky.feed.searchPosts({
  q: '*',
  tag: [<tag>]
});

I expected all the posts returned from this query to have the hashtag specified in the tag field, but none of them have it.

Then I tested manually querying https://public.api.bsky.app/xrpc/app.bsky.feed.searchPosts?q=*&tag=<tag> with a web browser. Same result: none of the returned posts has the specified tag.

If I specify a common word in the q parameter like 'the', it indeed returns all the posts containing 'the', but still none of them has the specified tag.

The only way I successfully searched by tag is by doing it like this : https://public.api.bsky.app/xrpc/app.bsky.feed.searchPosts?q=%23<tag>.