Macs drop connection from Forticlient VPN but not PCs

I have multiple Macbooks that drop connection about 30 seconds after connecting to the Forticlient VPN.  The odd thing is that all PCs can access the VPN without any issue and they do not drop.  I have tried on multiple Macs from multiple networks.  I have also tried multiple versions of Forticlient.  Can anyone assist as to why just MacBooks would drop the VPN connection to the Forti? Thanks.