So I was missing the eggs and bones in this weeks ascendant challenge (Keep of Honed Edges) so I went to go do it and figured I may as well check if I also needed the time trial, because if I'm already there and doing it may as well make sure I never need to step foot in that specific challenge ever again. So I do a speed run of it and clear it in a few minutes tops and at the exit to the challenge the chest didn't spawn. So I cleared it again but faster because now I remembered what to expect, still no triumph. even tried reloading the section of the map by fast traveling and sparrowing back to see if that fixed it, it did not. went to orbit to see if reloading the entire destination worked to a very familiar result. So something with either Season of the Haunted or even an earlier patch broke Ascendant challenges timer so as far as I can see the emblem from completing all six time trials is unobtainable.