I was just wondering, if I’m the only one having this issue…
For details, please have a look at the Github issue I opened four days ago, but due the complete absence of reaction there I thought I may ask here: Broadcast notification always pops up twice · Issue #615 · openhab/openhab-ios · GitHub
Has the iOS app being abandoned? No activity since January, not even a single comment on issues,… - is is really dead?
Check the devices tab at https://myopenhab.org/. Chances are you’ll find your device listed twice. Try removing one and that probably will fix your duplicate notifications.
As for your other question, I don’t know if there’s anyone still working on the iOS app. Development seemed to drop off suddenly early this year. I wish I had the skills to contribute (and had the free time) as it was a very exciting year of development before that. Disclaimer: not a complaint; just a concern.