Throttled Ethernet Connection

I'm fairly new to linux, I downloaded Bazzite last night and I'm struggling to figure out an issue I'm having with my network. I recently swapped my ethernet cable for a Cat 8 and whenever I do I'm either stuck on 100mbit/s or the connection refuses to take at all and I'm stuck with no network connection. Any help would be appreciated I'm not entirely sure what I'm doing wrong.