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d360f6d95d
Since 94250e42a0, UART output is suspended when entering sleep mode (deep or light sleep). This makes sense for light sleep, where sleep normally takes small amount of time, and flushing the UART would add a lot of latency. But this breaks existing behaviour for deep sleep, where UART output was previously sent out before entering sleep mode. Closes https://github.com/espressif/esp-idf/issues/2145