Number Item is not updating in Basic UI (but only at one place in sitemap)

Setup, Configuration and Use Scripts & Rules
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1

OK, this is driving me crazy. I have a Number Item that is used to set the temperature of multiple thermostats in a room. I put it in a sitemap using a SetPoint Item and when I change the number, the SetPoint value is not update, but the temperature is set. If I put the same item in another part of the same sitemap everything works fine.

This all works well both in Classic UI and on the Android App.

Here is my sitemap:

// Works as expected
Group item=Test {
	Setpoint label="Wohnzimmer [%.1f °C]" item=WZAllTempSet minValue=4.5 maxValue=30 step=0.5
}
// Does not update displayed value, but related rules execute
Frame label="Wohnung"{
	Group item=Wohnzimmer {
		Setpoint label="Wohnzimmer [%.1f °C]" item=WZAllTempSet minValue=4.5 maxValue=30 step=0.5
	}
}
2

I have seen similar things if I alter items and site maps after using them at least once in a UI. What helped me was a restart of OH. Have you already tried this?

3

Yes, but to be sure I just retried. No luck…

4

In my eyes this could be a bug in Simple UI, even though I cannot reproduce an example. Strangely it happens for all Items that are meant to set the temperature in a room. The problem seems not to be related to having the item in group that is in a frame…