GT-AC5300 - "Gaming" (Lan 1, Lan 2) ports capped at 100 Mbps

Hi, everyone!

I need help regarding GT-AC5300. On both LAN ports marked as "gaming" network speed is capped at 100 Mbps.

I have tried to restore the router or changed the port on which my computer is plugged into.

The outcome is as follows. On every other port, I have 1 Gbps but those two don't work as expected.

Adding screenshot of my Status screen

Thanks for any help in advance