Light building not going to swarm

Previously when my entire project was on one level the swarm took over the light build which was great.
To package my project I had to split the project it into various Sub levels on one persistent level, now when I need to build my light again the swarm doesn’t kick in.
I can ping my remote agents and they say they are available and unassigned in the coordinator but aren’t present in the agent.
I am on 4.10 and the scene is one persistent level with 15 Sub Levels and around 300 lights in total.

It may be worth noting the last build I did was on 4.9 and that hung on the last few %, The fix for that was included in the 4.10 release but since then I haven’t been able to use the swarm at all.

Any help would be greatly appreciated.