Treasure maps and other maps with icons cause a DecoderException when decoded as an item

[joshuaprince]

Describe the bug
Reading any map that has an icon (most notably treasure maps) with wrappers such as WrapperPlayServerWindowItems kicks the player.

Client log:

[16:18:41] [Netty Epoll Client IO #13/ERROR]: Network Exception Caught
io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:container_set_content'
... truncated ...
Caused by: io.netty.handler.codec.DecoderException: Failed to decode: No key rotation in MapLike[{float:180.0f,type:"minecraft:red_x",x:-1399.0d,z:1545.0d}] missed input: {+:{float:180.0f,type:"minecraft:red_x",x:-1399.0d,z:1545.0d}} {+:{float:180.0f,type:"minecraft:red_x",x:-1399.0d,z:1545.0d}}

Software brand
Paper 1.20.6-130
PacketEvents 2.3.1-SNAPSHOT (rev 3352f25)

Plugins
Just PacketEvents, built from source with added wrapper

How To Reproduce

            public void onPacketPlaySend(PacketPlaySendEvent event) {
                if (event.getPacketType() == PacketType.Play.Server.WINDOW_ITEMS) {
                    WrapperPlayServerWindowItems w = new WrapperPlayServerWindowItems(event);
                    w.getItems();
                }
            }

Either find a shipwreck and open a chest that contains a treasure map, or give a map with an icon:

/give @s minecraft:map
[ explore the map ]
[ replace MAPID with the map ID just explored, and coordinates with your coordinates ]
/give @s minecraft:filled_map[minecraft:map_decorations={"a": {"type": "red_x", "x": MY_X, "z": MY_Z, "rotation": 0}}, minecraft:map_id=MAPID]

Log out and back in. Since the item is now in your inventory, it always kicks you on join until the WrapperPlayServerWindowItems is removed.

Expected behavior
No exception or kick.

Screenshots
N/A

Additional context
N/A

[booky10]

Which client version? Also 1.20.5/1.20.6?

[joshuaprince]

Which client version? Also 1.20.5/1.20.6?

Also 1.20.6. Turned out to be a pretty simple fix, #811