Zigbee Bulbs update immediately to UNDEF, Items don't change from this

[rossko57]

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[SOLVED] Items receive commands but stopped to update their states

Hi everybody, I’m using the latest version of OH (2.5.5-1) + Zigbee binding and recently experienced a very strange behaviour. (I’m not exactly sure when it startet unfortunately.) When sending a command to an item, e.g. by using a sitemap switch or a rule, the item receives the command and executes (e.g. light turns on). However, the item state doesn’t get updated. What I’d expect: 2020-05-29 15:02:08.189 [ome.event.ItemCommandEvent] - Item 'Licht_AZ_Schreibtischlampe' received command ON …

which sort of petered out.
It does describe a kludge, a temporary workaround of forcing autoupdate. That at least gives you the state reflecting most recent command, but not true state.