You're both right;
if my windows key is the only one not working and you ask me if the keyboards plugged in then expect an impolite answer.
if all the keys have stopped working then 'is it plugged in?' is a reasonable question. (although if the answer is 'no' then it is very embarrassing, hence people getting a little ticked off).
On topic;
a) asking for a screenshot is very often the default request when dealing with 'in game' issues. Is the same as asking for a crashlog when the game properly breaks. 90% of the time it will reveal the issue since we get to see the entire setup in its full context.
[examples of this could be a nearby redstone torch/lever accidentally turning off a machine, inadvertently blocking a steam vent, pipes facing the wrong direction, or an incorrectly assembled multiblock]
b) [with the probably exception of hoppers] not everyone on here is familiar with Vanilla MC (just watch some Direwolf videos). A good number of us haven't played vanilla for several years, and will occasionally go 'oh thats vanilla now? woah....' on a feature thats been in the game for years.
As for this bug;
I've tested this in my instance (pack version 3.2.20) and hoppers would not insert anything into steam macerators
Desmen tested this in 3.2.21, its specifically cobblestone and other stuff worked fine- suggesting its probably a bug.
I guess a few other things Des could check would be electric variants of the macerator, and other steam machine that can process cobblestone.
Sadly this is an old version of MC and an old pack, so unless a patch has already been written its quite unlikely a fix will ever be made. If there is a patchthen updating Gt could fix this.
