MCU boot reduce the size of HID buffer

Hello Nordic Team, 

I'm struggling with a bug on HID transfert.

My product send HID buffers with a size of 32 bytes, everything was working fine so far.

But when I adder MCU boot with DUF over cdc uart the buffer sent doesn't correspond to the data I wanna send.

It's seems that default value are sent after 16 bytes instead of the value I want to send.

I have no error on my log and my code says that I've sent successfully the 32 bytes but the value doesn't correspond.

Do you have any input on it ? 

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