[Solved] Upgrade from 2.5.10 to 2.5.11 resulted in missing MQTTv1 processing

Have no Tasmota devices… all Arduinos with wired Ethernet via MQTT… spread more over the property than on the ‘living spaces’… doing pumps, tanks, valves, irrigation, gates, etc. various hubs (or rather concentration points) connected with fibre (to protect from lightning).
The house is still being build :yawning_face:

My current approach is to not touch this config/setup until I find time to migrate to OHv3 (mid next year).

I went through backups to check the file date of addons.cfg… it wasn’t changed in the last 1.5 years, since then I had 3 updates in 2.5. Go figure.

[edit_1] … just found this snippet " Dec 16, 2018 — # MQTT Actions. There is an openHAB 1.x addon, called “MQTT Action”. It allows to send arbitrary payloads to arbitrary topics from rule and script…" I am using the publish() command in rules.