Hi.
My reading comprehension seems to leave quite a bit to be desired this early in the morning

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At that case, the jack's just worn out and should be replaced. I consider it a periodical maintenance for thart typ of a jack.
There's little or nothing that can be done if the contacts wear out. At best You can coaxe a gig or a two out of the jack by bending the contacts if you're on the road, but that's all. Been there, done that.
Unless Your neck and bridge PU are connected stereo (impossible
AFAIK with the jack Ibanez is using on the actives), only one of them acting up does mean there's a problem somewhere outside the jack as well though.
Regards
Sam