As per this post
https://discourse.nodered.org/t/mqtt-node-not-working-after-nr-update/22138
some time ago I tried to update my NR installation but after updating I had an error with the MQTT client and had to switch back to v.0.20.07. Anyway - after solving this NR restart issue - I'll try to update NR again and see if everything will work as expected.
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