Is it possible it is related to a Homey firmware update instead?
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It’s better to help the developer fixing the bug(s), but to answer your Q:
Pro 201x: Not possible, but maybe it’s possible by downloading the matching app code and install by CLI.
Pro 2023: If you created an USB offline backup, when the app version still was on the previous test version, you should be able to roll back
You can go back to the latest stable version though, by just installing it from the app store.
