manifest.json <link hrefs> turn into [object Object]

Created by: jonikorpi

(Using 0.4.0)

If I add this: <link rel="manifest" href="./src/manifest.json">

It turns into this in dev: <link rel="manifest" href="[object Object]">

And into this after build: <link rel="manifest" href="[object" object]="">

(Found a few issues talking about serving manifest.json but nothing that specifically mentions this happening.)