Nested followLinks can result in incorrect embedding parameters

[ybnd]

Describe the bug

It should be possible to declare nested links using followLink as follows:

export const BITSTREAM_PAGE_LINKS_TO_FOLLOW: FollowLinkConfig<Bitstream>[] = [
  followLink('bundle',
    {},
    followLink('primaryBitstream'),
    followLink('item')
  ),
  followLink('format')
]; 

with, the expected URL embed parameters
embed=bundle/primaryBitstream&embed=bundle/item&embed=format

i.e. the primary Bitstream and Item links at the same level. However, in practice the parameters become

embed=bundle/primaryBitstream&embed=bundle/primaryBitstream/item&embed=format

To Reproduce

TODO: vanilla DSpace reproduction steps

Workaround

The intended URL parameters can still be made as follows:

 export const BITSTREAM_PAGE_LINKS_TO_FOLLOW: FollowLinkConfig<Bitstream>[] = [
  followLink('bundle', {}, followLink('primaryBitstream')),
  followLink('bundle', {}, followLink('item')),
  followLink('format')
];