Issue
When upgrading BLT 10 to 11 it can overwrite the blt.yml file
Affected Applications
If your team is upgrading BLT from 10 to 11 can replace the blt.yml which can affect your develop teams CI builds giving the team no clear reason why the CI builds are not executing as expected.
Resolution
Make a copy of the blt.yml file before the team upgrades or find the git commit where the change was made revert the commit.