I got a PROBLEM!!

[katycat]

Every time I go on to roblox (an app) and start playing a game it kicks me out 

Does anyone know how to fix it?

[VueeyLe]

What tablet do you have?
Sounds like you're running into "RAM" limits on your device.

Meaning the device is closing the app down because it doesn't have enough memory aka RAM to run the application.

[katycat]

I have a model SM-T510 tablet

[MembersAccount]

It may be your RAM or storage. Roblox uses some storage to run games.