Same problem here. I did some checks and I believe this is related to the firmware or device hardware version. I have about a dozen devices (HS100/HS110). Half of them is on (fwVer=1.2.6,...

For your information: I filed a support-case with TP-Link about this.

I have the same issue here. It looks like all my devices (HS100 and HS110) that are running fwVer=1.2.6 and deviceHwVer=1.0 do not get the correct time. I did an update of all devices, using the KASA...