BlockDelimiters cop: Semantic block incorrectly recognised/autocorrected as procedural block

[myabc]

Environment

rubocop (0.32.1)

with these settings:

BlockDelimiters:
  Enabled: true
  EnforcedStyle: semantic

Issue

To reproduce:

rubocop -a on the following code:

      h[i] = [predecessor.detect { |j| j[key] == i },
              current.detect { |j| j[key] == i }]

will incorrectly flag an offense:

example.rb:1:30: C: [Corrected] Prefer do...end over {...} for procedural blocks.
  h[i] = [predecessor.detect { |j| j[key] == i },

and rewrite the code as such:

      h[i] = [predecessor.detect do |j| j[key] == i end,
              current.detect { |j| j[key] == i }]

[myabc]

/ @NobodysNightmare