As the title suggests, I have experienced a bug where my black spirit rage wouldn't increase further than a random amount. Mine was at 99.3% while others report various numbers. None exceeding 100%. None being able to use a 100% - always below 100% The only hope you have of fixing this currently is by changing server or relogging. Removing your alchemy stone or entering Battle Arena and back WON'T fix the issue. Good job at breaking more than you "fix" guys.