Repeated, recent flooding has now breached the bank around the bend in the left half of that earlier image, and you can see a small spit of land near where the break occurred. Now, water from the pond flows around the mill dam and re-enters the Millstone River downstream, as below.
During high flooding, the overflow also joins the tributary shown in my Autumn Branch picture. What is relatively new is that there is now an occasional flow even during times of low water. Last week, it was particularly brisk. Because the gristmill long ago ceased its operation (the upper floors are now a home), this change is merely part of the morphology of the Millstone River, and one that has been fascinating to observe and record.