I cannot ping my raspberry pi3 (mypi.local) from Windows or WSL, however I can ping my NAS (freenas.local) or laptop (Shuttle.local) just fine.
Pinging the Pi works fine from my Linux laptop, it is just the Windows machine that has issues. Every system can ping every other system with the sole exception of the Windows machine pinging the Pi (the other way around works fine).
Using the IP address of the Pi works, but since everything is on DHCP I would really rather not hard-code any addresses into configuration files and such.
Error message:
Ping request could not find host mypi.local. Please check the name and try again.
The Pi is using Avahi, and Windows is using whatever Windows 10 uses for .local name resolution. The laptop and NAS are both using Avahi as well.