The survival of fat is dependent on several factors. The amount of fat that survives is not affected by a history of fat transfer surgeries. If you are having trouble with your results, you should see several experts in your area to discuss a game plan.
As the saying goes, “there’s no chance like the first time”. The donor site fat and recipient bed (buttock) are the most viable the first round of BBL. Thereafter, the fat is limited and it and the buttock tissue have scar tissue within which is inelastic and has poorer blood supply necessary for fat survival. Your only relatively safe, predictable, and permanent option is buttock and/or cosmetic hip implants. Glad to help.