error from summarize(.groups = "drop_last")

[d-morrison]

I'm getting an error when I try to use "drop_last" in summarize() with multidplyr; here's a reprex:

library(nycflights13)
library(multidplyr)

cluster <- new_cluster(4)
cluster_library(cluster, "dplyr")
#> 
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#> 
#>     filter, lag
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, setequal, union

result = 
  flights |> 
  arrange(origin, dest, year, month, day) |> 
  group_by(origin, dest, year, month, day) |> 
  partition(cluster) |>
  summarize(.groups = "drop_last",
    dep_delay = mean(dep_delay)) |> 
  mutate(
    prev_day_dep_delay = dplyr::lag(dep_delay, n = 1, default = NA)) |> 
  collect()
#> Error in `cluster_call()`:
#> ! Remote computation failed:
#> `.groups` can't be "drop_last"
#> i Possible values are NULL (default), "drop_last", "drop", "keep", and
#>   "rowwise"

^{Created on 2022-05-04 by the reprex package (v2.0.1)}