IIRC my Axial Wraith had some slop there too. They don't fit in snugly. It came with plastic lockers I had to upgrade when I went brushless. Man, Axial stuff was crap.
This thread has become a history lesson 😂
Looks like it was built entirely out of aftermarket parts... Maybe the axles are stock. Anyway, crawlers are very configurable (it's not uncommon to run different axles on a chassis or mix and match).