ESP32 Firmware Corruption?

I built a simple Wi-Fi thermometer to monitor the temperature of a Hotbin . It uses and ESP32 and sends the data to Prometheus for storage. It's not uncommon for there to be gaps in the data because it is entirely solar-powered. Especially so in the winter months. Recently there was an unusually long gap. Over a week went by with no data. That included some days which I was sure had enough sun to…