The answer
No. Closing an app is not the same as initiating a channel close; a channel can remain open while its node is offline. Settlement requires the protocol close process.
What to do next
Preserve the wallet recovery material and channel backups; reopen the app or follow the wallet’s documented channel-close procedure.
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Frequently asked questions
Can an offline Lightning node still forward payments?
No. A fully offline node normally cannot actively participate in routing until connectivity returns.