I installed echoe rom pure Note 4 V47 and with synapse I set the max cpu clock to 2.0 GHz and governor to alucard. I think the freeze happens because the high drain cpu current in complex operation, like shot a photo, the cpu voltage drop too low. With underclock the cpu current it's a bit more low and the cpu voltage do not drop too much. With android 5 the max benchmak on antutu was about 50'000 while in android 6 the max benchmak antutu is 75'000 on my note4 with echoe rom. The increased performance cause high current drain from battery and maybe the power circuitry is not adequate.
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