Ipad Mini 5 Roblox frozen

I've bought a new iPad mini 5. I've restored my account since my old iPad mini 4. Roblox opens on the new iPad, but it hangs immediately when I try to play a game. I went to the Apple Store and traded the iPad for a new one, and I still have the same problem.
Roblox does not work on the iPad mini 5 !!