Workspace & Sheet Sharing Permissions

I've noticed recently that workspace owners are not automatically made the sheet owner. Previously, I thought that if a sheet owner moved the document to a workspace outside of their ownership the sheet ownership would be transferred to the workspace owner. Is this not true anymore?

Additionally, I've moved sheets to workspaces where a previous admin has become the owner of the sheet. I'm unsure how this is done because I - being the owner - am not transferring ownership to anyone.

For context, I've been working in Smartsheet for two years and in the last 1-2 months I've noticed these changes...or at least what appear to be changes. Can someone explain how sharing permissions work in this capacity?