I believe that might be a Ram issue on phones.
Its because on that sequence she talks about the map and the image is a GINOURMOUS map.
8K by 8K, it has double the pixel count of an 8K image (66 Million, and an 8K image has around 33M).
It is very detailed and big and it was commissioned, hence why I don't really want to use anything else.
I currently don't have a workaround for this as the game would navigate through the image as if it were that size. Reducing its size to fix mobile issues would break several features of the game that involve the map, which is used a lot in the story telling.
But I do hope to take a look at this issue later down the line.
Sorry for the inconvenience caused.