OH3: Manual created item, the value is not visible in sitemap

Setup, Configuration and Use Migration
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1

How to reproduce in OH3:

Setup Page, Items, +, Add Item, Name=test, Type=Number
You can see in the Items-list the item has now the value NULL
Create a rule to update the item by test.postUpdate(10)
You can see in the Items-list the item has changed to the value 10
Add this item to a sitemap Text item=test
The item name is showed in the sitemap, but not the value

2

Try giving it a state presentation, if you want to see the state

Text item=test label="testing [%s]"

There’s more than one way to assign a default state presentation to an Item, depending how you define it and use it.