I have Sonic Fiber and I have 10G Up / 10G Down.

Prior to getting the BE800, I was getting much higher upload speeds (See 4/21/2024 compared to 5/24) with my old router. (See below picture)

Here's what I've tried so far:

• Ethernet settings,
• different cables,
• switched between the WAN combo port and the regular WAN port 
• Turning on/off Flow Control in the TP-link console
• Tried Auto-Negotiation and 10000Mbps Full Duplex

Note: This impacts wired connection only. Wireless upload speeds are within correct range.