Inserters can now pull from the main output and burnt result inventory of an entity.
https://forums.factorio.com/99501

I'm on mod version 0.3.6 and Factorio 1.1.39... if I place an inserter down, it will begin pulling items out of the burnt result (used air filters), but going forward, it won't pull out new used air filters. It's like a trigger or flag that there's something to pull is not being set to awake the inserter.

Is anyone else seeing this behavior?

are you using filter inserters?

hmm, I swear I tested using filter inserters, but I just did and it works. thanks!

The "works at first but not going forward" happens with regular and long-handed inserters, so I guess that's not really supported by Factorio even with the change.

it's gotta be a new bug they created by fixing the old one but good to know the old solution still works haha