Power cables in Rockwool

Hello all, I'm renovating a bedroom and taken the opportunity to put a few more power sockets in the adjoining room (see pic). This is an internal stud wall - I've put Rockwool acoustic slabs in to dampen sound but now I'm thinking should I remove the 2 pieces of Rockwool I put either side of the cable the electrician ran in? Will it cause an overheating issue?

N.B. There's a metal back box behind the noggin where the cable comes out in the next room:

 

Thanks Herbs! I left a small air gap but kept reading conflicting info on it, cheers