Character Sliding (Animation breaks)

Hello! I have this custom bear model with animations, however he slides? If i try to ungroup and put it in a new model the animations break for some reason?

https://gyazo.com/0b7f1812b197b1d0200c92943447a95c (Sliding)

https://gyazo.com/ba41955edbcd164631dd56c1cf9de196 (Animation breaks)