FlatMap breaks syntax when autocorrecting chained methods on separate lines

[wteuber]

Expected behavior

array_of_hashes
  .flat_map(&:to_a)
  .each_with_object({}) { |(k, v), h| (h[k] ||= []) << v }

$ ruby -c file.rb
Syntax OK

Actual behavior

array_of_hashes
  .flat_map(&:to_a)

  .each_with_object({}) { |(k, v), h| (h[k] ||= []) << v }

$ ruby -c file.rb
file.rb: file.rb:4: syntax error, unexpected '.' (SyntaxError)
  .each_with_object({}) { |(k, v...
  ^

Steps to reproduce the problem

file.rb:

array_of_hashes
  .map(&:to_a)
  .flatten(1)
  .each_with_object({}) { |(k, v), h| (h[k] ||= []) << v }

rubocop --autocorrect-all --only Performance/FlatMap file.rb

RuboCop version

Include the output of rubocop -V or bundle exec rubocop -V if using Bundler. Here's an example:
You can see extension cop versions (e.g. rubocop-performance, rubocop-rails, and others) output by rubocop -V,
include them as well. Here's an example:

$ [bundle exec] rubocop -V
1.45.1 (using Parser 3.2.1.0, rubocop-ast 1.26.0, running on ruby 3.2.0) [arm64-darwin21.5.0]
  - rubocop-minitest 0.28.0
  - rubocop-performance 1.16.0
  - rubocop-rails 2.17.4
  - rubocop-sorbet 0.6.8