ISP Upload gets very slow

[Matrix3000k]

I am using a barebone hardware that I ordered from amazon and running the latest version of open sense on it. The device/router has 4 10GB SPF slots and 5 2.5GB ports. When I plug into the 2.5GB ports my download and upload speeds are fine. The moment I plug an multi gig sfp+ and plug my pc into that, my download speed remains just fine but my upload speed goes from 50MB per second down to 4 or 5 MB per second. I have tried multipule sfp's with the same result. I am thinking the issue has to be some sort of configuration in opensens that is slowing down my upload speed. Has anyone run into this issue or know how to fix it? Im not a noob at this but im not an expert either.