This may actually be tricking you..
I bet the Windoze machine is closer to the CHIP right?
I found that the CHIP would not connect to my windows machine inside despite the fact that I could"see" the hotspot from the CHIP that was outside.. about 10m away.. it just failed to connect..
If i went outside with my phone and went really close to the CHIP and connected, and then I walked inside and "carried" the signal with my phone I could magically connect from the PC!!
I suspect that the CHIP transmits with very, very, low power by default, except for it's SSID broadcast. once it is connected though it does the normal "WiFI" thing during polling where it will change power levels to keep a connection, thus once one device is connected ones that could not "hear" the CHIP responding through the 2.6 Ghz "hash", can suddenly hear the responses.
there is a lot of criticism of the CHIP on-board wifi out there. The antenna it uses is useless
M0KNC ( Used to be VK4KNA millions of years ago! )