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nRF52840 errata question, sometimes high current state

SDK: 15.3.0

Softdevice: S140 6.1.1

Brief usage: multi protocol radio driver 1.5.0, uart1, spi1, twi1, saadc, ble, gpiote 2 inputs, pwm1

I have been finding high current issue of our productions in the field. 

Fast battery consumption is reported in the field.

but, this issue is not reproduced in our office.

There are about 2,000 products in the field.

Luckily, the battery state can be saved and stored on the server for log trace.

When the device goes to sleep and wakes up, we noticed a significant decrease in battery status.

All possibilities are being checked.

I have experience with uarte before. link, but, there is not uarte issue in errata. -> chip is QIAAC0 --> rev1?

Are there any other problems not listed in errata?

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