I think we discovered last month that there is some lack of clarity over payment dates. The website shows payments being made on the 28th, but there is also a statement that they will be sent within "approximately 30 days" of the end of the month. I think we had various understandings of what that meant, and expectations about when we'd receive our money.
The Google calender shows PIP appearing by 30th June and EFT and secure checks arriving by 5th July. These are presumably backstop dates, so there may not be any difference in when we actually get paid from previous practice. But it does suggest that the point at which we are supposed to panic should be slightly later than has been the practice to date.