Sporadic "Loki: Cannot connect to Loki. 502" Error When Clicking "Save and Test" Button

I’ve Grafana v6.7.3 and Loki v1.4.1 running in the same cluster. The promtail (1.4.0) is running on the separate application cluster. In Grafana, I sporadically get “Loki: Cannot connect to Loki. 502” error when I click the “Save and Test” button. Additionally, I also get the logging dashboard (12019) return a “Template Init” error sporadically when I try accessing it. It can’t be a Grafana to Loki communication issue as both sit in the same cluster. Has anyone else run into this issue?