My last derog fell off EQ a couple of months or so before the other CBs, so I think your experience might be typical.
Scores: March 21 FICO 8: EX 810, TU 808, EQ 813
AoOA: closed: 40 years, open: 30 years; AAoA: 14 years
Amex Gold, Amex Blue, Amex ED, Amex Delta Blue, Amex Hilton Surpass, BoA Platinum Plus, Chase Freedom Unlimited, Chase Amazon, Chase CSP, Chase United Explorer, Citi AA, Sync Lowes, total CL 203k