(Not sure how to add spoiler text to my message, so know this bug description contains some spoilers for in game activity.)
I'm at the point in the game where I dropped all three necessary items into the rock formation. I put in the tuning fork and the three ring binder right away. I found these items with the metal detecTOR long before I entered the reservation and talked to Homsar.
Later I solved the puzzle with Bubs in order to get the pottery shard. I dropped it in, talked to Homsar, and he still speaks in half jibberish, half english. So I can't get into the cave and progress any further.
According to the walkthrough I have done exactly what I needed to do in order to progress. The fact I'm stuck in limbo makes me think I've encountered a bug. Or did I miss puzzle a step somewhere? Maybe my save point is corrupted?
If this is a bug, could it have been triggered by the order in which I tried to solve the puzzle? (dropping in the 2 items found with the detecTOR immediately, then later giving the pretendix to Bubs, getting the pottery shard and dropping it in.)
Sidenote: After reloading my save point right before I talk to Homsar, I get the dreaded eye dispearring bug on him. This is the first and only time I've witnessed this bug in Episode 2. (my DirectX is nice and updated.)