https://www.tfwm.org.uk/plan-your-journey/ways-to-travel/buses-in-the-west-midlands/upcoming-bus-service-changes/
Further down the page, Diamond have listed changes to the 57 & 326, due to the continuing delays in Willenhall.
In short, 57 curtailed Wolves to Willenhall, while revised timetable on the 326.
By the way, Diamond havent updated their web page yet, at time of posting.