[FTS] RBAC: Unable to create alias on an index created by the same user on sasl bucket

Build
5.0.0-2012

Testcase (not merged yet)
./testrunner -i INI_FILE.ini GROUP=P0,cluster=D+F,skip-cleanup=True -t fts.rbac_fts.RbacFTS.test_fts_admin_permissions,users="""[

{"id": "johnDoe", "name": "Jonathan Downing", "password": "password1", "roles": "fts_admin[sasl_bucket_1]:bucket_admin[sasl_bucket_1]"}

]""",sasl_buckets=1,default_bucket=False,GROUP=P0

Testrunner log- https://gist.github.com/arunapiravi/1741126dd38ba00fa5c6c645d4955330

Steps

• Create a Couchbase user with roles FTS admin and Bucket Admin for sasl bucket
• Login as new user
• Create an index on sasl bucket - is successful
• Create an alias on the created sasl index - Fails with error
  "Forbidden. User needs one of the following permissions: cluster.bucket[].fts!write"

Attached screenshot of UI. Not attaching logs as reproduction is very easy and consistent. Please let me know if you would like to see the logs.