Ok, apparently, from more tests I've made, It has to do with some of the gear I had wearing. I forced myself a death. when I respawn, I could successfuly go to my inventory, pressing E key.
As soon as I grabbed the lost items the game crashed.
Guess I could live with that.
More information regarding this bug.
I can repeat it, by simply enchanting a item, dying, and try to pickup that enchanted item after respawning. It had not anything to do with pressing E key to go to inventory.