SMB connection limit

Hi all,
I’m trying to use the My Cloud Home as a shared storage drive for a home office compute cluster and it definitely seems like the maximum number of allowed connections to the Public SMB share is 5. Is this a known limitation?
The computers I’m using to connect are running Linux, but I’ve tried with Mac and Windows machines and get the same results: regardless of OS, as soon as five computers are connected to the SMB share the sixth connection will fail.
If there’s no workaround for this I guess I can return it and upgrade to a My Cloud Pro, but it’s disappointing that I can’t find any mention of it in the product literature.