Upgrading host Node.js to 20.x breaks Umbrel/LND on Raspberry Pi 5

[TylonHH]

Summary:
After manually upgrading the host Node.js to 20.x (to run BOS 20.x), Umbrel/LND stopped working on my Raspberry Pi. Reverting Node back to v18.20.4 restored normal operation. BOS is installed manually via SSH (not an Umbrel app).

Environment:

• Hardware: Raspberry Pi 5 Model B Rev 1.0
• OS: Debian GNU/Linux 12 (bookworm)
• Kernel: 6.6.51+rpt-rpi-2712 (aarch64)
• Host Node.js (working): v18.20.4
• Umbrel apps: Bitcoin full node + LND

Steps to reproduce:

1. SSH into Umbrel host.
2. Upgrade host Node.js to 20.x (manual).
3. Start Umbrel/LND.
4. Observe LND/Umbrel services crash or fail to stay up.
5. Downgrade Node.js back to v18.20.4 -> services recover.

Expected behavior:

• Umbrel/LND should continue to run even if host Node.js is upgraded, or at least provide clear guidance on supported host Node versions.

Actual behavior:

• Upgrading host Node.js to 20.x causes LND/Umbrel to fail (reverts resolve it).

Request:

• What host Node.js versions are supported for Umbrel OS?
• If Node 20.x is not supported, can this be documented clearly?
• If it should work, what logs or config should I share to help isolate the failure?

Notes:

• BOS 20.x requires Node 20 APIs, which is why I tried upgrading host Node.