Single Object problem with new translations logic

[jekuer]

Preflight Checklist

• I have completed all Troubleshooting Steps.
• I'm on the latest version of Directus.
• There's no other issue that already describes my problem.

Describe the Bug

This is a follow-on to #8186 and #8173 / #8174.
(hopefully, this time not already fixed ;-) ).

I have a single object collection with translations in it.
Whenever I fill the translations fields and save, a new entry gets created under the translations collection, but it is not showing up in the single object.
Everytime I repeat this step, the translations collections receives more and more items.
Interestingly, the field (under translations), which should connect to the single object collection is 1 for the newest item and somehow gets nulled for all other items, when I repeat the steps.

To Reproduce

1. Create a Single Object Collection with translations.
2. Add translations and save.
3. Check the fields and what got created within the translations collection.

What version of Directus are you using?

v9.0.0-rc.94

What version of Node.js are you using?

The Docker one

What database are you using?

Postgres 11

What browser are you using?

Chrome, Firefox, Edge

What operating system are you using?

Windows

How are you deploying Directus?

Docker