FWIW, I ended up giving my HS103s to my parents and they worked just fine on their TP-Link Mesh deco mesh routers. I then ended up getting a pair of another brand smart plugs from Costco and they...

@Linsook I suggest returning them. No support from TP-link.

@Dirkomatic I'm more likely to return the tp-link plugs rather than re-setup a new router with all my devices. Pretty disappointing response (non-existant) by tp-link.

@jmb9 I'm encountering this same issue with the same plug and router! Were you ever able to solve this? I tried turning off the 5ghz network and didn't have any success. I should mention I'm running...