That’s strange. You’re right. If I run a quick test, I get the same behavior. I wonder if the api has changed recently. What version of OH are you currently running?
Anyway, there is a sort of a cheat workaround here. If you set itemTags to just a comma,
itemTags: ,
it will return all items. This is overkill for what you need, and I don’t know if you will see a performance drop if that has to run several times on the widget, but it’s worth a try.