Customer has a Loki recorded rule which is stored in Prometheus. The function for this recorded rule includes an aggregation (in this case sum). The automatic query provided by Metrics Drilldown on this recorded rule metric included an additional sum aggregation and we the panel has no data.
Slack thread for more context:
https://raintank-corp.slack.com/archives/C075BDBTX96/p1770379074384009