We recently added an api param 'variant' for the donate action in the DonationInterface extension.
Following the usual convention, we added the string 'apihelp-donate-param-variant' to en.json and qqq.json: https://gerrit.wikimedia.org/r/445451
In i18n-bot's next update, it removed the qqq.json message while adding translations for some other messages: https://gerrit.wikimedia.org/r/445682
This is getting really tiresome! Every time the message is deleted, all our tests fail on the next patch.