l10n-bot self-force-merging sometimes breaks mediawiki/core master. Example from today: https://gerrit.wikimedia.org/r/#/c/194725/
Yes, it sucks that our tests depend on the values of localisation messages in random languages, but that's the situation. This has happened in the past and will happen again in the future, and it's very annoying every time.
Please make the bot just vote C+2, without V+2, and let the tests run. If a commit fails the tests, anyone can amend it and fix up.