Q: all apps that I paid before are all gone.

it suppose to be cloud icon when I want to download them again but its not.

this start to happen when I change to my new ipad.

at first I can still see previous download apps with cloud icon.

there are some (or many) apps that not often use so I didnt download them to my new ipad.

after a while I want to download previously download apps again, but they all gone.

when I check in appstore, those suppose to be cloud icon in previous download apps become price tag or free tag again.

what should I do?