Sporadic Wi-Fi issue - possible memory leak?

Hey all - I have an issue with my newly-built Win10 Enterprise system (v1803 build 17713.1002), although I've seen this happen with another Win10 computer I own using the exact same physical NIC.

Suddenly the WiFi will basically stop. Usually I cannot ping my default gateway, and no traffic passes. (Occasionally it just slows down terribly, local subnet pings are ~2,000ms.) The NIC is a D-Link DWA-192 with the latest driver.

Here's what I seem to have figured out: it appears to happen when I do large file transfer, whether to my NAS or to the Internet (MS OneDrive, this time). Running a ping window to the Internet with the -t parameter, I saw this today:

Reply from 1.1.1.1: bytes=32 time=6ms TTL=57
Reply from 1.1.1.1: bytes=32 time=39ms TTL=57
Reply from 1.1.1.1: bytes=32 time=51ms TTL=57
Reply from 1.1.1.1: bytes=32 time=133ms TTL=57
Reply from 1.1.1.1: bytes=32 time=149ms TTL=57
Reply from 1.1.1.1: bytes=32 time=195ms TTL=57
Reply from 1.1.1.1: bytes=32 time=271ms TTL=57
Reply from 1.1.1.1: bytes=32 time=393ms TTL=57
Reply from 1.1.1.1: bytes=32 time=562ms TTL=57
Reply from 1.1.1.1: bytes=32 time=826ms TTL=57
Reply from 1.1.1.1: bytes=32 time=1127ms TTL=57
Reply from 1.1.1.1: bytes=32 time=1432ms TTL=57
Reply from 1.1.1.1: bytes=32 time=1891ms TTL=57
Reply from 1.1.1.1: bytes=32 time=2650ms TTL=57
Reply from 1.1.1.1: bytes=32 time=3451ms TTL=57
Reply from 1.1.1.1: bytes=32 time=3804ms TTL=57
Request timed out.

It sure seems like some resource is getting exhausted during these file transfers. It is sporadic and not reproducible every time.

Some additional information:

• I'm testing with a NetGear WNDA3100 now to see if it fails in the same way. That adapter is having a similar type issue, but it just drops to "General Failure" for a couple pings and comes back:
  Reply from 192.168.1.254: bytes=32 time=234ms TTL=64
  Reply from 192.168.1.254: bytes=32 time=122ms TTL=64
  Request timed out.
  General failure.
  General failure.
  Reply from 192.168.1.254: bytes=32 time=4ms TTL=64
  Reply from 192.168.1.254: bytes=32 time=75ms TTL=64
• My Wi-Fi indicator in Windows does not drop with the D-Link NIC, it tells me I'm connected and I still have an IP.
• The NetGear link actually drops sometimes, Windows says Not Connected and the pings go to "General Failure", necessitating that I pull the USB NIC and replug it to restore connectivity.
• I'm on an 802.11ac network by Aruba Networks, noise floor is clean on the channel and stats from the network side look okay. Other devices in my network continue to work just fine during these issues.

Any thoughts or troubleshooting tips? Willing to try just about anything at this point...

Thanks,
Mike

It's back! After a good long run with no issues, my connectivity problem is back with a vengeance.

Again, large file transfers crawl along at 500Kbps while the NIC is connected at a phy rate of 1300Mbps. Downstream works a little faster but not much. This is still the D-Link DWA-192, with the latest driver as suggested above.

If I switch to an Ethernet cable, everything flies along.
If I switch to an older 802.11n adapter I have here, everything flies along.

I've removed the D-Link, removed the driver, reinstalled, no difference. Rebooting doesn't help. Any thoughts?

Mike

Thanks for the advice Ken. I did some more research last night on a D-Link customer forum and there were multiple people reporting that the USB 3.0 cable that ships with the unit could be bad... I recall now that the cable that came with it didn't attach tightly to the USB port on the NIC. I've been using another USB 3.0 cable for months now... but as a test, I pulled the existing cable and tested yet ANOTHER cable, and as soon as I plugged it in, everything worked fine. Now, I know that I made more than one change there; I changed the cable, but I also disconnected it from the computer, so that powers off the external NIC obviously, and forces Windows to reconnect it after, so somewhere in that process things improved.

As a test, I moved BACK to the previous cable, and everything is now fine on that one too! So it's very frustrating. I've thought about changing adapters, but there are very few 3-spatial stream USB WiFi NICs on the market, and they aren't cheap. My internet connection is a gigabit each way, so having the 1300Mbps phy rate actually makes a difference over a 2-spatial stream NIC. I'll do some digging around for alternatives...

Thanks!
Mike