Inconsistencies when connecting to Turntables?

Hi All

Any help would be massively appreciated.

Often having issues when trying to use my 1210's through my DDJ-RR, using with Rekordbox on a Macbook. Sometimes the cue won't come through my Headphones, or sometimes just through one ear, sometimes only plays through one speaker etc. Restarting my Laptop can sometimes be a temporary fix which makes me wonder if theres anything on my laptop side that is affecting it, not a techy person at all so if anyone has ideas please fire away