FortiLink: ISL timing-out for trunk(_FLinkDhcpDisc_) when Fortiswitch "exec reboot"

Hi Team,

I have configured a FortiSwitch 108F-FPOE // version S108FF-v7.2.4-build5148,230530 (GA) // via fortilink and everything works ok, but when I reboot the Fortiswitch, I start getting messages saying "FortiLink: ISL timing-out for trunk".

Info

Before restarting the Fortiswitch

After restarting the Fortiswitch

Fortiswitch Trunk configuration

config switch trunk
edit "_FLinkDhcpDisc_"
set auto-isl 1
set static-isl enable
set members "port10"
next
end

What can this be due to?

Thanks & Best Regards,

Juanmi