https://www.babylonjs-playground.com/#B2S8JX Here is the demo.
Both assetsManager.onProgress and assetsManager.onFinish stop working as the document described now. https://doc.babylonjs.com/how_to/how_to_use_assetsmanager#manager-callbacks-and-observables
Is it a bug, or we need to update the document now?
Sorry, they are working correctly.
It's my fault to ignore the "loadingUIText".
I expect that assetsManager.onFinish = function(tasks) will give the processed tasks.