n8n - 💡(How to fix) Fix Loop node disfunction on repeated passes

Bug Description

The Loop Over Items node works correctly when invoked the first time, but produces incorrect outputs on the following passes - the loop branch is never called, instead the new inputs appear to just be added to the prevously accumulated output and sent down the done branch immediately.

To Reproduce

testloop.json

Expected behavior

The Loop Over Items node should loop over items passed into it, in accordance with its purpose, the documentation, and the common sense, or signal an error describing the exact cause preventing it from doing so.

Debug Info

Operating System

Windows 10 220H2

n8n Version

2.20.7-exp.0

Node.js Version

24.14.1

Database

SQLite (default)

Execution mode

main (default)

Hosting

self hosted