Do you experience problems during downloading?
Check your connection in Status and Interface settings window.
Use Test Server in Config > Servers.
We will probably ask you to do a test using only basic settings.
Do you experience problems during repair or unpacking?
Enable +Debug logging in the Status and Interface settings window and share the relevant parts of the log here using [ code ] sections.
I don't have any synology devices. This is an unraid build.
It still seems to have a large amount of corrupt rar files though, sometimes it will fully download 3 or 4 versions of a movie before it can find one to pass it's checks. I will have to continue investigating.
Resolved: Finally figured it out. I removed the "overclock" on the memory and everything started working without error. Even though it passed memory checks etc, I downclocked it from 3600mhz to whatever default DDR4 speeds are. 2100mhz ? I removed the XMP/DOCP profile in the bios, and havent had an issue since.
For running dockers and plex transcode etc, I don't think I'll see a noticeable speed difference in any of my tasks. Even sabnzbd doesn't use much of the cores for an unrar.
Thank you to Sander and others for the help. I'll make a donation as a thanks.