/remake trigger should have occurred, but did not

So today I played a ranked game while in promos. One of my teammates was afk for the first 2min then finally disconnected 20 seconds later. Although he was standing still the entire time my team was not given the option to /remake. We would have won that game if he was there but he wasn't so they pushed towers as five and we had no answer for it. I ended up losing my promos and our support we demoted. We tried to manually initiate /remake but it said it was unavailable. The afk detection for this kind of thing must be improved.