It does hide default buffs. You probably have another mod interfering.
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff, The Tao of Pooh
That was only a work around. Making EBB disabled and then enabled made it call its code again after the mod it was conflicting with had already done what it was going to do. It didn't really "mysteriously disappear", I'm sure you just deleted a mod or changed a setting.
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff, The Tao of Pooh