progressBarDelay not working when Back press

1

I set progress bar delay to 2000 by changing this.progressBarDelay(500 to 2000). Turbo cache control no cache. It works when visiting new pages by clicking links or forms. But if back button pressed, Progress bar immediately showing instead of 2000 delay. Additionally, tried Turbo.setProgressBarDelay(2000); but not working on back press.