Invalid H3

[RealCoChenchao]

Below is a H3 index derived by the function, however, this H3 is not a valid index. The valid index derived from Python is 8a283082a677fff for this placekey.
placekey::placekey_to_h3("zzw-22y@5vg-7gt-qzz")
#> [1] "8a283082a677f80"

^{Created on 2021-08-21 by the reprex package (v0.3.0)}

Didn't dig in too much. It seems like this package is binding h3ToString, from C, different from Python.

[RealCoChenchao]

Follow up with a reprex with validation piece.
placekey::placekey_to_h3("zzw-22y@5vg-7gt-qzz")
#> [1] "8a283082a677f80"
h3jsr::is_valid("8a283082a677f80")
#> [1] FALSE

^{Created on 2021-08-24 by the reprex package (v0.3.0)}