App not showing 3D map

Hi, any advice on how to show the 3D map?
There is only black screen. After completed mowing task.

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Pareil, je n’ai pas de visualisation  en 3D,  juste une mauvaise  carte noire et avec un peu de vert

Hello，
The 3D map requires loading a significant amount of data. Please check if the surrounding Wi-Fi signal is strong and if the device is connected to the network. Try again in an area with a stronger Wi-Fi signal.

3D map finally loaded. The problem is, that when you  tap back while loading the map, it will not download the map anymore.
I made some changes to zone. I splitted one big zone and after it started download 3D map again.