Doc comment syntax (`/** */`) is not working when attached to recursive modules

[cannorin]

• ReScript Version: 11.0.1
• Playground link: https://rescript-lang.org/try?version=v11.0.1&code=PQKhAIEFxYCgC2B7AJgVwDYFNwCcsDGU4AXOAN7gAuAngA45XgC+4AvBXONfY3M3DigIAIRjwAhgDsU4MWUq0G1Fu07clfZkA

The doc comment syntax (/** */) is not working when attached to the recursive modules starting with and:

/** A */
module rec A : { type t } = {
  type t
}

/** B */ //<- offending line
and B : { type t } = {
  type t
}

It produces the following error:

[E] Line 6, column 0:

Did you forget to attach `res.doc` to an item?
  Standalone attributes start with `@@` like: `@@res.doc`

I think there is a bug in the syntax side since the following code is working correctly:

/** A */
module rec A : { type t } = {
  type t
} 

@res.doc("B")
and B : { type t } = {
  type t
}

[zth]

Closed in #6613