Invalid protocol buffer m_pb_stream

[Andy]

Hi,

We are running into a weird issue with some our devices when they are in the bootloader.

The bootloader fails with this error in nrf_dfu_validation.c: Invalid protocol buffer m_pb_stream. Running the same binaries in other boards works just fine, but some of them started failing with this error for a some reason unknown to us.

The error is happening with the bootloader of SDK 15.0, but the bootloader also fails even if we flash the newest bootloader from SDK 17.

Our devices are based on NRF52832s.

Any idea why this started happening? As I said, I can run the same binaries in another boards without any issues.

Thanks for you help.

[ildar_prophet]

would you please briefly share?

[ildar_prophet]

It seem the case when sending legacy DFU init packet to a secure BL.