InfluxDB cloud, our time series database provider, experienced a prolonged outage with their query interface, which caused all hisRead operations to fail in the 75F platform. Time series writes (hisWrites) did not appear to be impacted. So far there have been no signs of customer data loss during the time of the outage.
This vendor service outage did however result in heatmaps and trend charts being rendered unusable until the incident was resolved.