JXA error with app.move()

I’m creating a smart rule that performs a series of checks on incoming PDF files into the inbox and processes them accordingly. I’m writing a JXA script to do the processing.

One of the tasks is moving files to a group. I’ve reduced the TC to the following:

function performSmartRule(records) { 
    let app = Application('DEVONthink 3');

    let group = app.createLocation('/Test', app.inbox);

    records.forEach(function(record) {
        app.logMessage('Record: ' + record.name());
        app.move({record: record, to: group});
        app.logMessage('Moved: ' + record.name());
    });
}

When the smart rule is applied, the on performSmartRule (Error: Error: Can't convert types.) error is logged. The offending line is the one with the app.move() call.

Now the curious thing…

If I run the above as a standalone script (with osascript) it works like a charm.

I’ve spent many-many hours already trying to figure out what could be wrong but sincerely I’m out of ideas. This here is my cry for help.

Thanks in advance!