Shell getShardDistribution helper does not accumulate chunk counts on 5.0.0-rc1

/var/lib/mongodb-mms-automation/mongodb-linux-x86_64-5.0.0-rc1-ent/bin/mongo --port 57098

MongoDB shell version v5.0.0-rc1

...

MongoDB Enterprise mongos> db.bucket.chunks.getShardDistribution()

Shard m50-sh_0 at m50-sh_0/deployment-1.example.com:57000

 data : 1.4GiB docs : 4197 chunks : 0

 estimated data per chunk : 0B

 estimated docs per chunk : 0

Shard m50-sh_1 at m50-sh_1/deployment-2.example.com:57001

 data : 795.56MiB docs : 2327 chunks : 0

 estimated data per chunk : 0B

 estimated docs per chunk : 0

Shard m50-sh_4 at m50-sh_4/deployment-2.example.com:57004

 data : 858.12MiB docs : 2510 chunks : 0

 estimated data per chunk : 0B

 estimated docs per chunk : 0

Shard m50-sh_3 at m50-sh_3/deployment-1.example.com:57003

 data : 828.38MiB docs : 2423 chunks : 0

 estimated data per chunk : 0B

 estimated docs per chunk : 0

Shard m50-sh_5 at m50-sh_5/deployment-3.example.com:57005

 data : 795.22MiB docs : 2326 chunks : 0

 estimated data per chunk : 0B

 estimated docs per chunk : 0

Shard m50-sh_2 at m50-sh_2/deployment-3.example.com:57002

 data : 857.1MiB docs : 2507 chunks : 0

 estimated data per chunk : 0B

 estimated docs per chunk : 0

Totals

 data : 5.43GiB docs : 16290 chunks : 0

 Shard m50-sh_0 contains 25.76% data, 25.76% docs in cluster, avg obj size on shard : 350KiB

 Shard m50-sh_1 contains 14.28% data, 14.28% docs in cluster, avg obj size on shard : 350KiB

 Shard m50-sh_4 contains 15.4% data, 15.4% docs in cluster, avg obj size on shard : 350KiB

 Shard m50-sh_3 contains 14.87% data, 14.87% docs in cluster, avg obj size on shard : 350KiB

 Shard m50-sh_5 contains 14.27% data, 14.27% docs in cluster, avg obj size on shard : 350KiB

 Shard m50-sh_2 contains 15.38% data, 15.38% docs in cluster, avg obj size on shard : 350KiB