In the climax of The Force Awakens, Kylo Ren is sees a weapon

> 
>  (Luke's old lightsaber)
> 
> 
> 

lying a few feet away in the snow. He reaches out to telekinetically pull it to him, as we've seen Force users do plenty of times in the past. This time, the weapon merely wriggles a bit, before

> 
>  flying off towards Rey instead. 
> 
> 
> 

Kylo has shown to be rather proficient in using the Force up to that point. Why would he suddenly be unable to do something so simple?

> 
>  Do lightsabers retain some kind of loyalty, or is there any indication that its history with Luke would have messed with Kylo? 
> 
> 
>