Your question is rather vague and ambiguous. You didn't give any description of what you are alluding to? Are you referring to stock ROMs or custom ROMs? Do you mean that you lost root or have some other, specific problem?
Most updates will lose root, which is why a prudent user of a custom user would not accept updates. Or would at least hedge his bets by using mobile odin pro or super su pro that would attempt to regain root after an update. For that matter, since the S5 Active is exclusive to ATT, why didn't you post in the ATT subforum where you'd likely get more replies?