When I shift my DA front der so that the chain goes from the small ring up to the large one, sometimes the chain rubs against the front der even when I'm in the middle cogs in back. (Note these are brifters.) When this happens, in order to get it to stop rubbing, I nudge the release lever for the front der to the right until it clicks again. Normally this would bring the chain back down to the small ring, but in the situations where the chain is rubbing when it shouldn't (and only in those cases), it just clicks, the rubbing stops and all is well (but the chain doesn't shift back down). Is this an adjustment issue, is there something wrong with the derailleur, or is this something that is typical (in which case sorry for the dumb question)?