This style appeared about a year ago and I have never been able to deal with it. I can change it by either moving the thermometer or tapping the arrows. But it never sticks. I thought maybe it was my tablet or phone, so I’ve tried many. No difference. It seems that there is a “DONE” button I’m missing. But where? How?
I’m down to two dimmer-type devices left on ST and they are both custom (but not mine). The one I posted was from a community driver for the OSRAM GardenSpot mini’s.
Looks like a simple bug in the Device Handler code. 3 of the 4 sliders work fine, but the main LEVEL slider code was messed up.
Try replacing the setLevel() function in your DTH with the following which I modified slightly. The level value now sticks, however you’ll have to test it to see if it behaves as desired with the real device.