Journalists, it is widely admitted, are engaged in new forms of boundary work on social media platforms, seeking to uphold their influence over news dissemination. This study focuses on music festivals as a case study to examine journalists' endeavors in maintaining their authority on social media. We analyze Twitter coverage of music festivals in France during the summer of 2018, systematically collecting data from 16 festivals of varying sizes and musical genres. Through this analysis, we investigate journalists' engagement and evaluate the trading of authority with other stakeholders through mentioning practices. Our findings challenge the prevailing notion of journalists as primary arbiters of authority on social media platforms. Despite their conspicuous presence during music festivals on Twitter, journalists emerge as relatively passive participants compared to other stakeholders in the music scene. Moreover, their ability to assert or receive authority from the broader public sphere is limited. This study sheds light on the bounded nature of journalists' boundary work on social media platforms, emphasizing the evolving dynamics of authority within digital information ecosystems.