Hello everyone,
Any update about this issue ?
I still encounter lots of download failures, either for movies or TV Shows episodes.
Context :
Even with lightweight movies (3-5GB), download fails without explicit error message. I have to retry and retry and retry until it finally downloads the last few percentages.
I moved your post to it’s own thread since the one you originally posted in was over 2 years old and also regarding the Mac OS.
Best to start a new thread that may get you better responses. 
Is this a local Plex server or a remote server?
If you are able to replicate the issue and send in a report (and post the code here), it would help us get a better idea of what is going on.
Hello James,
It’s a local server.
I’ve just sent a diagnostic via email (5GMHK).
It looks like there is a network error which appears when connecting to the Plex server.
You may check to ensure both devices are on the same network, and also perhaps removing the Plex share from Infuse and reconnecting.
In some cases, disabling the Plex Relay feature on the server can help as this will help prevent Plex from routing some connections outside of the local network.
This happening with regularity when pulling down from JellyFin, via Tailscale, and on local network. Fails every 60-90 seconds. Streaming is perfect. Just downloading is the issue.
Try reinstalling Infuse, updating Plex, or checking for network issues; this seems like a software or connectivity bug.
It seems like a bug with Infuse Pro or its compatibility with Plex; consider reinstalling the app or checking for updates while ensuring Plex settings are optimized for direct play.
I’m having this same issue on my M4 iPad Pro running 18.4. Running latest software on Plex Server and Infuse Pro and downloads just fail after getting to 5-6%. Maddening as I’m taking a 3 week trip tomorrow. Since the Plex app is FUBAR and I prefer Infuse anyway on all platforms I was sure this wouldn’t be a problem. But it is. I restarted Plex Server, stopped Infuse and relaunched, but nothing works. Plex.direct is whitelisted in my DNS and so relay is not the issue. I run Tailscale but I turned that off on the iPad and it still won’t work. No issue streaming and I have great WIFI. What is up Firecore?