I don’t think Truebones had a problem with Wungun using the assets, but Wungun’s video only credited for animations and Truebones thought his animations were used as well which made him a little angry (I mean the license probably does not require crediting anyway but I haven’t looked into it). Again, no proof from either side.
Now the thing was in Truebones video he talks about some forum posts from Wungun elsewhere where they both technically agree but it was still a veiled jab at Truebones which is what caused him to dig into Wungun more. Truebones has done some strange things in the past and is now more or less on a vendetta trying to get others in trouble for the same thing he got in trouble for (assuming I understand the situation correctly, it’s pretty muddy). But yeah Google has some interesting stuff.