Even if you file the crank, that bolt is almost as close to the chainstay. I'd get a longer BB.
The bolts actually could do with tightening down, which will probably help a little. I’d rather not get a longer BB as it will put the chainline off.
@AlexD started
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Even if you file the crank, that bolt is almost as close to the chainstay. I'd get a longer BB.