[BUG] Stlink serial com closes after a specific number of bytes sent

[BiliouriV]

Describe the bug
I noticed that when Pyluos sends a specific json message with a binary chunk of size 41 then the communication is closed and any other json message can be send, until the next detection, while flashing with bootloader.

Network configuration

• Gate (mcu with stlink connection)
• Bootloader in L0

How to reproduce the bug
Flash an application where the size of the binary of the last chunk is 41.

Additional context
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