I hit the breaking point and went full monty, started from scratch.
A parallel thread gave me the final push: Bosch-Siemens Home Connect is not working after some days - #19 by Heszi
Deleted the Bosch app from Homey, removed the Homey from connected apps and services in the Bosch home connect app, removed the washer/dryer from it, then reset the machine to factory settings.
Then I re-registered everything, installed the latest test version of the bosch app on Homey, added the device.
The machine showed up online and notifications started coming through just fine after a test run.
Now it’s just a matter of seeing how long it lasts…
I’ll keep you guys posted, though I wouldn’t hold my breath.
