Running the clone operation through the Tintri interface the process will fail with "Operation not supported: All the Datastores for selected VM are not on same Tintri VMstore". This issue may be inconsistent.
VMware vSphere 8.x with Tintri NFS VCP plugin
This is a known bug within Tintri software and is not a VMware vSphere issue.
Please reach out to Tintri Support for assistance with this issue.