Ambar cannot search using tags that were manually added via API

[cogicero]

It appears impossible to search by a tag when it was manually added to Ambar via POST. Scenario:
(1) Ambar ingests a document and indexes it
(2) I make a POST call to https://{website.com}/api/tags/{%FILE_SHA256%}/manual/{%TAG_NAME%} to add a tag using the sha256 hash ({%FILE_SHA256%}) of the document. The mahnually added tag is {%TAGNAME%}
(3) Now I search Ambar using https://{website.com}/api/search?query=tags:{%TAGNAME%} but I get 0 hits. This is very puzzling behavior because when I make a GET call to https://{website.com}/api/tags my manually added tag is shown right there.

However if I search by any of the automatically added tags e.g. ocr and ui-upload, I get results. I am pretty sure the installation was done properly since I paid the developer for the Docker image and the installation. Any hints on how to tackle this, please? I am kind of stuck with this software now.

[stale]

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