On mobile, realm worlds can not be downloaded if they are bigger than 470mb

We have a realm and I wanted to download it - wich dident work, because we where over the limit of 470mb. But in the Realm Conditions ist said, that u can download ur world. Obviously I Cann not. Then there's another bug in our realm: After playing 30 min, it sometimes happens, that ur getting reseted for the last 30 mins. This is very frustrating, because all ur down work of the last half our is now undun. Please fix this thank u