I’m not sure whether this started in a specific version, but I find the Ownership field very unintuitive. It often seems to default to the one organisation of which I am a member. It is also very easy to miss, leading to frequent, unintentional creation of personal items in the organization. I would think such an important field would be higher prioritised in the UI. Even when I select My Vault it selects the organisation as the owner by default. On a few occasions it has selected myself as the owner, but I have not been able to figure out a pattern.
I would submit an issue on GitHub, but first I wanted to check that I wasn’t missing anything.