There are skins errors where the correct texture is not shown in the skins of the alex model exactly on the left leg, also there is still the error of seeing the other players with the same skins and they will always look the same even if they change to different skins, Also sometimes when dying, the arms of the skins bubble up as if they were zombie arms always raised, since since the skins editor was implemented in 1.13 they still have those errors, they should already solve these errors in the skins more thoroughly. that from what I see there is more and more