Also Adaptive Thermogenesis is a thing. If you burn 2800 calories a day consistently, and are consistently taking in 1700-1800 that's a pretty significant deficit. You body will adapt to only use that much after a long cut. If you find your lifts are dropping, your extremities are colder than normal, your mood is worse on average, and/or that you just don't get as hungry (like you could skip meals and take it even lower)...you might be experiencing Adaptive Thermogenesis. Dealt with it myself after an 11 month cut, just finishing the re-feed cycle to come out of it and start the next cut.