What everybody here keeps touching on, from this angle and that, is generating moisture (= heat = steam = tongue scorch) faster than it can dissipate.
Drying tobacco robs flavor richness & depth but makes it easier to manage. YMMV, but I think that's a poor trade-off. So I load it @ tin-moisture level, do the first char light, and put it down. A little later, it's ready for the second char light. When that dwindles and goes out, it's time for another rest-&-recovery. That might be ten minutes, but so what ?
Then it's lightly tamped (barely touched) & we're underway. If/when that gets warmish, a cleaner and back down it goes to cool all the way back down again.
Repeat as necessary.
The point is to have every toke ideally tasty -- not to win a pipe smoking contest or impose your will on something with a mind of its own.
Do it right, and there's no "dottle" left. If there is one, it dries out the same way the rest of it did & gets smoked & enjoyed just as much. Sometimes even more.
Maximising flavor & enjoyment involves cutting procedure some slack. The problem isn't that you can't do it, but that you can't do it with the assumption set you're taking for granted.
:face: