Bromine Pool

Hello all, I have in recent months started using bromine in our 65,000L outdoor pool, and notice that whenever I’ve had to add chlorine (hypocrite) in addition to what the chlorinator produces in order to oxidize the bromide, that the total chlorine levels then drop from around 4ppm to almost zero within 24 hours. I assume that the oxidation process of bromide to bromine consumes the chlorine…correct?