New adobe express web pages running slow on Android

Hello, all the web pages I created with new adobe express run very slow when opened on some mobile devices, in particular I have no issues with my Iphone when opening them both via Chrome or Safari but the issue arises on my colleagues' Android phones. This is not related to wifi connection since we are all connected to the same wifi. Also, our web pages created with old express version run smooth on all the devices.

Thanks