Not sure if this can be considered a bug, but here it is for future reference.

==> devtools::document(roclets = c('rd', 'collate', 'namespace'))
Updating rapiens documentation
Writing NAMESPACE
Loading rapiens
Warning: generics-linkage_disequilibrium.R:60: Missing name
Writing get_ld_variants.Rd
Writing NAMESPACE
Documentation completed
roxygen2 version: 6.1.1.