ROOT browser only shows allows one file to be loaded
Here is a production with two output files: https://lhcb-analysis-productions.web.cern.ch/pipelines/?id=3649760&prod=FEST&job=spruce_exclusive_feb_2022
Here is a production with two output files: https://lhcb-analysis-productions.web.cern.ch/pipelines/?id=3649760&prod=FEST&job=spruce_exclusive_feb_2022