[Therion] Missing explored length in continuation-list statistics

Just studying an output from a recent project, and I noticed that 'explored' lengths in scraps recorded against 'point continuations' are not reported in continuation-list html exports. (I have only tested html, plan and extended scraps in Therion 5.3.16) 'Explored' lengths in centrelines recorded against stations with flag continuation are reported however. A bug perhaps? Or a quirk of my project? Bruce