There seems to be an issue regarding Thunderbolt Networking (a feature of Thunderbolt which establishes a peer-to-peer connection emulating a virtual Ethernet adapter) where file transfers to a host stall in any version of Windows 10 Home beyond build 1809. Downloads from a remote host work fine, but uploads do not.
I wanted to reach out to the community to see if there is a consensus on this feature being broken. I am using a QNAP Thunderbolt 3 (TB3) NAS (QNAP model TS-453BT3) as the host with a Lenovo Yoga 920 (model Yoga 920-13IKB Laptop [ideapad] - Type 80Y7).
I have done extensive testing on this issue (including loading numerous builds of Windows 10 Home) to isolate where the problem begins. I've detailed this on the QNAP forums. As long as I do not update the OS beyond build 1809, the functionality works correctly.
There is another issue with the TB3 connectivity which may or may not be related to Windows 10. The laptop will, after a period of time, select the lower-power connected source (e.g. the NAS) over the high-power source (e.g. the Dock) to attempt to charge. Of course, the system discharges faster than it can charge, and it will not switch back until you disconnect the lower-power source. This is a real problem when you're trying to use the NAS as an attached drive.
I've sent my Lenovo in for repair on multiple occasions for both issues. Each time, they replace the motherboard in an attempt to address. I've heard others have had success running a different OS (e.g. Linux). Also, my Macs have zero problem with the transactions with the same device using the same connectivity.
Please let me know if this sounds familiar and whether you've heard anything from Microsoft recognizing the issues.