Component "Library" example doesnt extend to examples with more than one component

[SumNeuron]

Expected behavior

Actual behavior

If I have two components and try to make a component library, doesn't work.

Steps to reproduce the behavior

Take component library example, copy paste MyComponent to MyComponent2, add intermediate file library.js. Import both components into new file. Store in object: library={MyComponent:MyComponent, MyComponent2:MyComponent2} and export it. Set this file to the input file.

First zip is single component "library" (works)
Second zip is multi component library (does not work)

vue-rollup-npm-test.zip
vue-rollup-npm-library-test.zip

[SumNeuron]

Anyone here? :)