Diablo Immortal Slow startup

Hi, basically Diablo Immortal for iPhone 12 Pro Max has slowed down at the start of loading in the last two heavy updates. On the contrary, on iPad Mini 5 and on computers the initial loading has remained unchanged. I’ve already tried uninstalling the game and re-downloading it but the situation hasn’t changed on the iPhone. I would like to know how to fix.

The problem I anticipate is not the connection because I use the Wi-Fi and I repeat only on the iPhone this anomaly occurs

This is the Italian Battle.net Support forum - please check the EN forum here