unenclose has trouble with lists

[mdbauer]

When we create a list of closures, for example using
tag_fs <- setNames(lapply(void_tags, void_tag), void_tags))
where the tag function and the list tags can be found at http://adv-r.had.co.nz/dsl.html,
then unenclose(tag_fs$command) does not replace the variable tag by "command" but instead by the content of the entire list void_tags.

I am 90% sure this behavior is not intended and hence should be classified as an issue/bug, but I may be missing something.