When your characters were missing consistently, were they blinded before then? Someone else reported that after being blinded (Blinding Radiance), the chance to hit was shown as going back to normal when it wore off, but the character continued to miss.
Yeah one of Griff's thugs definitely used blind a bunch in the fight, I can't remember exactly which characters, but that could definitely be it.
Saves for these issues are long gone, but will keep this in mind for future persistent issues.
