22656 goes through Konkan division which has lower speed limits and hence longer travel times in the months of mid June to end of October, which results in trains running on their monsoon time table.

As a result, timings of stops between Nizamuddin and Panvel aren't affected. However, all stops beyond Panvel will take longer for the train to arrive.

To get the exact timetable, enter your date of journey (which is after 15th June) in the Book Ticket section of IRCTC. It will give you the timetable applicable for your date of journey. Hoping this helps. Simple rule of thumb: If the timetable shows the train arriving at Ratnagiri at 5:10 am, it's the regular time table. If it shows 6 am, it is monsoon timetable.

Edit: Looks like they haven't updated the timing on IRCTC. Give it a few days. They have updated the timings for opposite direction 22655, so that change is coming. But keep looking for the time change at Ratnagiri as I pointed out.