text: Title: Ack() on successfull view submission throwing connection error (2)
  Body: (Filling out the following details about bugs will help us solve your issue sooner.)
  Reproducible in:
  
  pip freeze | grep slack
  python --version
  sw_vers && uname -v # or `ver`
  
  The slack_bolt version
  
  1.17.0
  Python runtime version
  
  3.9
  OS info
  
  Using lambda with X86_64 Architecture
  
  Steps to reproduce:
  
  (Share the commands to run, source code, and project settings (e.g., setup.py))
  
  I had already opened an issue but it got closed because I did not express myself correctly on the whether if it was solved, this is the issue that was being solved: 
  
  https://github.com/slackapi/bolt-python/issues/1215
  
  The problem is still happening despite all responses being correct. 
  