Merge commit doesnt trigger a build.

Hello, we're using BitBucket cloud. And when I merge master into some branch, before PR to master for example (to avoid merge conflicts), build doesnt trigger after this merge commit. And pending changes don't appear in TC. Yes, I understand what happens. TC checks VCS revision, and see no changes in checkout path. I have one, indicate some of like this "+:comment:''*merge into*" in branch specification. But maybe you have better or elegant tricks in this case?