I'm not sure if your clients are Windows, but if they are ensure you are not forgetting to add the VPN routes manually or via some preferred 3rd party tool.
https://documentation.meraki.com/MX/Client_VPN/Configuring_Split_Tunnel_Client_VPN
Note: This configuration involves manually adding entries to a client's route table, and should only be followed by users with a thorough understanding of routing mechanisms.