I use checkinHandlerFactory and editChangelistSupport extension points to make some actions with commit messages. I get CheckinProjectPanel implementation from CheckinHandlerFactory.createHandler(...) and use setCommitMessage(...) method.
With 2018.1-2019.1 that approach worked correctly
With 2019.2 setCommitMessage(...) doesn't make changes to commit that proceeded. Commit message stays as it was in commit window at button click.
Would you help me to handle that issue?