BIP-2 says:
BIPs should be changed from Draft or Proposed status, to Rejected status, upon request by any person, if they have not made progress in three years.
However, some BIPs were marked as Rejected earlier than 3 years after their last commit. Examples include BIP-140 (last commit before it was marked as Rejected in September 2017 / rejected in June 2020) and BIP-156 (August 2018 / June 2020). Why?