[Switch] Map [items] from Legacy that aren't from the center sometimes don't carry over during transfer

When transferring a specific completely filled-in medium-sized world, all 8 maps that aren't the center map do not carry over from the transfer. When held as an item in the inventory, they are replaced with a level 0 map 0, right near the origin.

 

However, I have had success in transferring one other world and its 3x3 map wall with no issue. I'm not sure what causes this.