I have a circuit where the AVR's supply voltage is kept at 1V (when switched off) by drawing parasitic power from an external source (+5V to 1k resistor, through protection diode of AVR input pin).
When power is restored (VCC = 5V), the AVR fails to return out of reset. The BOD or external reset has no effect. The issue was solved by using a 10k resistor, which limited the parasitic power voltage to 0.2V.
Has anyone had a similar experience? Is this a known issue with FLASH?