This is so weird, me and a friend started fresh on an official server and have gotten loads of sorcerer maps, directly from a sorcerer but also in the bag they sometimes drop
I have found that Sorcerers are now dropping the map - inside the pack they carry with them. Select the pack, - looks like a buddle of stuff, select in your inventory after picking up and USE with X, Map is now normally inside.
After USE the map and contents will now be in your inventory…