Roblox blocked on Managed Devices

Hi community,

I am an IT Deputy at a Primary School with a BYO iPad program. We manage over 300 student devices. Some of those devices, once they are going home the students are not able to access the app Roblox. We block a lot of these apps through our management system, however once they return home at the end of the day their iPads switch over to their personal systems. This issue has popped up, not on all devices only some, where they are not able to access certain apps/games and it says restrictions apply- or the app is faded and can't be clicked on. Wondering if anyone else has come across this issue and how to fix it.

Thank you