Wrong detection of "RuboCop: Lint/UnusedBlockArgument"

[lu-x]

Affected version: 0.27.0

Example:

  - [[1, 2], [2, 3]].each do |first, second|
    = first
    div title=second

Expected:
no linting offence

Actual outcome:
RuboCop: Lint/UnusedBlockArgument: Unused block argument - `second`. If it's necessary, use `_` or `_second` as an argument name to indicate that it won't be used.