So I animated bones on an armature, things were normal for a long time. Today I decided to mess with the animation and to my surprise the keys are gone! The animation still plays normally, and the keys appear on the timeline, but channels and keys are nowhere to be found on the Graph Editor when selecting a bone.
*Copying and pasting the same keys on the same channels on the same place or different places on the timeline to see if they would magically appear but it didn't work (by the way it works when copy-pasting keys from a bone to another, just create a key first then paste on the same channel)
*Messing with some controls on the Graph Editor that makes curves visible or hidden, and they didn't work
*Creating keys for the armature works but the keys are hidden too
*Creating keys for different objects, and it works. So the problem is not general, it's specific for the armature's bones
Can't provide the file right now but I guess that's enough info. By the way I am using version 2.79b. Researched a little bit to see if someone also had the problem. It seems to be a new thing.