Voxy sometimes freezes the screen after Minecraft is minimized

[T123MINECRAFT]

Sometimes when I minimize Minecraft to switch to another window and then switch back, the game screen freezes, but the sound is still playing and I can interact with the game.

[T123MINECRAFT]

I used Chunky to generate chunks, but some empty areas appeared. When I get close to these areas, the game loads, then the screen suddenly freezes, but I can still interact with the game.