A new anomalous delayed loss of D-D fusion products has been measured at the bottom of the TFTR vessel. This loss is delayed by about 0.2 s with respect to the usual prompt first orbit loss, and has a correspondingly lower energy, i.e. about half the fusion product birth energy. This loss process dominates the total fusion product loss measured 90° below the midplane for plasma currents I ⩾ 1.8 MA and major radii near R = 2.45 m, e.g. for recent TFTR supershots. This delayed feature can occur without large coherent MHD activity, although it can be strongly modulated by such activity. Several possible causes for this phenomenon are discussed, but no clear explanation for this delayed loss has yet been found