Question about smell an flavor

[teutonic terror]

I bottled two brews about three weeks ago, and before I could ask, all hell broke loose over there!

Anyway, when I was finished bottling and washed the LBK's out, I noticed the trub, in both batches had a burnt, almost rubbery smell.
Both batches were experimental hops, so I attributed it to that. But, both batches taste terrible.
One was Zythos and the other HBC 342.
Also, the yeast was S-04 in both batches
I've never experienced that phenomena before and I'm curious as to the cause.
Could it be autolysis?
I've done some reading and it sounds like it could be the culprit, but I'm curious if anyone else has run across this?

[Beer-lord]

Could be anything or a combination of all you mentioned. How did the beer taste?
Just to be safe, if you already haven't, soak the LBK's in PBW for 24 hours with warm (not hot) water than rinse well and dry.

[joechianti]

Sory to hear that, TT. I can't think of what would cause that, except possibly burning in the brew kettle. Not sure if you used HME or something else. If HME, I'm sure it wasn't boiled, but if something else, like LME, DME or grains, maybe it stuck to the bottom and got burned at some point. Probably a long shot, but that's all I can think of.

[teutonic terror]

Dummy here should have mentioned they were AG batches!

I'm sure that neither batch was scorched. Now, I'm wondering if my temps
got too warm during fermentation.
I cut all the bushes off the side of the house that my fermentation room is on and now
the afternoon sun is full on until it sets.
I soaked both LBKs with Oxi and neither has an off smell.

The flavor is improving slowly in both batches, so I'll probably just let them condition way longer than anything else!!