Problem with MPLAB Harmony

Описание: I use the memcpy function to copy the contents of one array to another as follows:

memcpy(app5Data.BufferTX,app3Data.BufferRX,sizeof(app3Data.BufferRX));
I have noticed that the first byte of the source, changes to zero.

You can see the array source before memcpy function and you can see the array after memcpy function is executed. (The first byte is zero).