NAT outbound automatic difference with manual

[Yourry]

Hello,

I am new to the OPNSense environment and I do not understand a small problem.
On my (virtual) server, OPNSense has a WAN interface.
When the NAT Outbound rules are on "Automatic": I have this config:



In this case everything works correctly except OPNSense itself (but not the machines on the LAN) has no WAN / internet (no ping - eg 1.1.1.1 => 100% lost).
And conversely when I set the rules myself like this:


It is the opposite, I can no longer connect to remote on OPNSense or a machine on the LAN but OPNSense can go on the internet (for example to update the firmware or ping 1.1.1.1 => ok)

And the hybdrid mod doesn't work better.
I don't understand the difference between the two options.
Do you have an idea?

Thanks in advance