I have noticed today that I can now in the app set the temperature in 0.5-degree increments for the KE110.
When I try this (manually or in the Smart Settings), the KE110 suddenly displays 51 degrees as the target temperature, and I get also this error again: https://community.tp-link.com/en/smart-home/forum/topic/850168

Firmware:

KE110 1.3.0
KE100 2.10.0
KH100 1.7.5 (updated today)

Target temperature before clicking "Synchronize":

Target temperature after clicking "Synchronize":