Zotero 5.0.30-beta.3+4c337e529

I have a computer with many collections, but I have a problem with only one, a collection named "Ontology" with several papers in it.

On the other computer, I have the papers in the "My library" (so they get synced) but they are not inside the "Ontology" collection (there is no "Ontology" collection there at all). Other than that all syncing seems to work properly in other collections and they get created when needed whichever computer I use to create them.

The "Ontology" collection is visible on the website (so it is there for sure).

Settings are exactly the same on each machine. And there is nothing customized except that I just changed the data path.

I have the unlimited storage.

In choose libraries on each computer I have only one and it is activated (as I said, things are syncing properly, just not collections).

So to make a short version:
Computer A has several collections, including one called Ontology
On Zotero website, I see that collection and all the papers in it
Computer B is synced, all the papers are in the "My library" but the "Ontology" collection is not there.
Creating new collections on Computer A and Computer B works perfectly, only that one is buggy so far.

I don't see any sync error on either machine.