On some instances of me playing, anytime I swap a weapon with a matchlock, or vice-versa it sets the BSR (Black spirit's rage) percentage from -10% to -1% range

If it is closer to -10%, this forces your matchlock to have 10-20 "explosion" usages - Which is great for doing high damage, but is super inaccurate - Which forces me to lock BSR

For every usage, it will go up about 0.5 - 1.0 percent, and is fixed at 0% (temporarily for that weapon)

However, if you swap weapons, it resets back into the negative range, which either forces you to:

Lock your BSR

Restart the game

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This issue rarely happens, but it is there- Not sure what causes it to go negative instead of 0, but it can be abused in Hunting or Combat