ECO mode cause board to constantly reboot when sleep time set above 2100 seconds

[Marvin-YYC]

the bug

I was testing a board outdoors running on a battery and solar panel, using ECO mode set at 1800 seconds (30 min) After several days I switched the board to go into ECO mode for 3600 seconds (60 min). The battery started to drain very quickly, and I discovered that the board was stuck in a reboot loop. When I changed the sleep time to 2100 seconds the issue went away. I tested at 2200, 2500, 3000, 3500 seconds and the reboot loop started again.

This is on a TTGO T-Display using CanAirIO Bike with AHT10 Temp + Humi sensor

Sorry, I should have placed this in firmware issues.