Connecting to Editor Hosting very slow. Something I'm doing wrong? (1.3.8)

In previous work I only required local bundles, and have not concerned myself with remote bundles.

Now that I'm testing remote bundles I have noticed that the Editor Hosting option seems to be incredibly slow to establish a connection. I might sit for 2 or 3 minutes before my first asset load completes. After the first asset loads, the rest appear to pop in quite quickly.

I have 4 assets in 1 group, set to pack separately.
- 3 prefabs (a cube, capsule, and cylender with standard shaders)
- 1 scene (contains a camera, a light, a sphere, and a script to load the 3 prefabs)

First, load the 1 scene asset.
Second, the scene contains an object that loads the 3 prefabs.

I end up with 4 different asset bundles in my build folder, so I know that it isn't a case where there's just one bundle taking a long time to load.


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However, on further testing, I actually no longer can connect *at all.* Device and editor both simply fail to load because the host can't be reached, with a message of 'Cannot connect to destination host'