Tbzep- did you 'end burn' the sugar propellant to generate smoke ?
I would think if it survived an 'end burn' in a 13mm casing it would certainly survive a 'port burn' as that burns from the center -out.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !