Network Speed Issues with NZBGet Downloads and remote shares

[DaneNYC]

I have my Unraid server setup to cache NZBGet downloads to a local SSD and then DirectUnpack to a remote share synology NAS. My problem is, it can't seem to upload & download at the same time. This is cutting my speeds in half between the two devices when downloading through NZBGet. Normal file transfers are able to maximize both up and down to near gigabit levels so I don't think it's an ethernet wire or switch issue.

NZBGet example of how this looks in the Unraid dashboard, you can see it either uploads or downloads but can't do both:

 

Vs. normal file transfers:

 

I've tried to figure this out for quite a while to no avail, hope someone can help, thanks!