The situation can be reproduced in the sandbox https://developers.arcgis.com/javascript/latest/sample-code/sandbox/index.html?sample=tasks-identify
1. change the visibility of parcelsLyr as follows
var parcelsLyr = new TileLayer({
url: soilURL,
opacity: 0.85,
visible: false
});
2. change the IdentifyParameters as follows:
// Set the parameters for the Identify
params = new IdentifyParameters();
params.tolerance = 3;
params.layerIds = [0, 1, 2];
params.layerOption = "visible";
params.width = view.width;
params.height = view.height;
3. click refresh
4. execute Identify
Result: we get an identify result with soil information, even when this layer is not visible.
