Slow speed on WAN interface

[ImChiip]

Hello Netgate forum! :)
I recently started with an SG-6100 to replace my PfSense DIY

I have two internet lines when I connect my laptop directly to the router of my isp I get these speeds

• proximus @ pppoe - 80up / 20down
• voo @ dhcp - 400up / 20down

When I put them via my pfsense I have no problem on the proximus except that on the voo I only get 80up / 20down

Do you have an idea ?