No longer displace items from clothing slots and fast slots. Can this be fixed?

What do  you mean by no longer "displace items" ?,  and what are "fast slots" ? , you have belt slots, clothing slots (now includes slot for parachute) and inventory slots,
Over the last few days i have checked all my 55 kits which include Admin, Players, Autokit(s) and NPC only kits, all of them redeem with their full contents with no problem at all. To check npc only kits you have to grant yourself the permission for those kits (these are the kits assigned to arm/clothe NPC's from other plugins NOT kits NPC's give out as i dont use that function)

I meant that before, if there were items in the slots of clothes or underwear, they were replaced by items from the whale, and now the items do not replace the occupied slots, but simply occupy empty ones. to take a kit for pvp, you must first remove everything from the clothing slots and only then take it otherwise all the clothes will fall into the inventory

I have been using kits since it first came out and occupied clothing slots were always replaced by new items of the same type, for instance if you placed the BanditGuard "suit" in the clothing slots it would remove the helmet, jacket, shirt (or any slot that showed red) and those items would go into inventory. If they are not the same type as the occupied slot item the would go into an empty slot. I have always put a warning in the welcome messages that players should not redeem a kit unless they had an empty inventory. There is nothing new in this plugins behaviour.