BE85 slow download (using SFP+ connection)
So I got a pair of Deco BE85 units.
My current configuration is ISP's optic fiber going straight into my Mikrotik CCR2004-1G-12S+2XS rounter's SFP28 port (I got a 25G up / 25G down connection, and it is really able to achieve those speeds, e.g. https://www.speedtest.net/result/c/56f1e8cd-ee62-40e5-b749-3345797a80aa)
Deco is configured to work in the Access Point mode with a wired backhaul, both units are connected to said Mikrotik router with a fiber optic cable using 10G SFP+ fiber optic modules.
The issue is that the speed test built into Deco units is only showing around 3.5G download speeds (but is showing 9.5G upload speeds). I am pretty sure that it is not a routing / connectivity / SFP+ module / ISP issue, because swapping that SFP+ module from Deco to a desktop computer would always show 10G for both upload and download speeds.
It is also not a speedtest server problem, as I'm using the same server that I know for sure is capable of 25G speeds (see the link above).
So the question is: How to fix that 3.5G download speed to be closer to expected 10G?
Thanks!