Custom Token Pattern's matched result not being consumed

[reaperdtme]

Hey, I'm pretty new to this, so bear with me. What I'm doing seems relatively straightforward, and it looks like it's working as it should, but the behavior is incorrect. I have simple grammar syntax:

A tab delimited description block initiated by a "`d" followed by at least one identifier as so:

`d A mover, activator, watcher
observer {}

In this case, we're not even running into tab delineation.

My rule in pseudo code is

rule concept
  option () => consume(Description)
  at_least_one( identifier )

My custom token pattern for description correctly returns:

Exec Result [
  '`d A mover, activator, watcher\n',
  undefined,
  undefined,
  index: 0,
 ]

The parser acknowledges this but then fails with an EarlyExitException on the at_least_one(identifier) trying to match against the same description string but on line two:

EarlyExitException: Expecting: expecting at least one iteration which starts with one of these possible Token sequences::
    <[Identifier]>
  but found: '`d A mover, activator, watcher
  '

{
    token: {
      image: '`d A mover, activator, watcher\n',
      startOffset: 31,
      endOffset: 61,
      startLine: 2,
      endLine: 2,
      startColumn: 1,
      endColumn: 31,
      tokenTypeIdx: 19,
      tokenType: [Object],
      payload: 'A mover, activator, watcher'
    },
    resyncedTokens: [],
    previousToken: {
      image: '`d A mover, activator, watcher\n',
      startOffset: 0,
      endOffset: 30,
      startLine: 1,
      endLine: 1,
      startColumn: 1,
      endColumn: 31,
      tokenTypeIdx: 19,
      tokenType: [Object],
      payload: 'A mover, activator, watcher'
    },
    context: { ruleStack: [Array], ruleOccurrenceStack: [Array] }
  }
]

Offset 31 in the sample text is the 'o' in the observer, but the error message says the image is '`d' Why is the description line on line 1 being replayed as line two against my identifier match

My identifier token is a simple /[a-zA-Z]\w*/