Omething went wrong while trying to provide suggestions

Test
1
  1. create an “unsolved” topic
  2. have another user respond (so last_post_user_id != user_id)
  3. backdate last_posted_at far enough back compared to remind_mark_solution_after_days
  4. run Jobs::MarkAsSolution.new.execute
  5. verify that the OP receives a PM from discobot
2

this is a solution for sure