Remember, this is a Closed Beta Test. This means the game is incomplete and WILL contain many issues! The point of the CBT is to iron out these issues in preparation of the FULL game launch.
Additionally, the older your device is, the more it will struggle to run the game. While we currently do not have recommended devices/specifications for the CBT, we will update our pages with recommended devices/specifications.
Please let us know if you are having any issues like this by getting in touch with us on Discord: https://discord.gg/w8A8KvP