Ok, so far I've seen this issue twice: when Astarion tries to get blood from you the first time, and when Raphael comes to visit in the camp (both scenes played back to back in this run, so it may be linked?), your character seems to have the exact same position as one of your companion, making them clip together.

When Raphaël comes to the camp, my character was at the same place as Gale, so my dwarf char was appearing to poke out of his chest.

When Astarion tries to get blood for the first time, at first I couldn't see my char:
[Linked Image]
[Linked Image]

Then, when I let him take blood, my char was at the same spot than he was, so:
[Linked Image]