This may have happened as part of SERVER-52545 which IDLified the command with strict: true. The listIndexes command used to take all extra arguments and treat them as a filter for the indexes to return. You can see it in the js wrapper function. While it is a questionable API design, I'm not sure if we intended to break it. At the very least we should fix the JS wrapper to either not take a filter, or use the agg form and pass in a $match stage.