After a lot of playing around I suspect a bug in HABot.
I think notification are broken for openhab 3.x. Can anyone confirm that notifications are working on a similar OH 3 installation?
runtimeInfo:
version: 3.1.0
buildString: Release Build
locale: de-AT
systemInfo:
configFolder: /etc/openhab
userdataFolder: /var/lib/openhab
logFolder: /var/log/openhab
javaVersion: 11.0.11
javaVendor: Azul Systems, Inc.
javaVendorVersion: Zulu11.48+21-CA
osName: Linux
osVersion: 5.4.73-1-pve
osArchitecture: amd64
availableProcessors: 2
freeMemory: 90867176
totalMemory: 702545920