Fix: Game Space 691 reserves a separate virtual disk. Go to Settings > Game Space > Space Management and manually expand the allocation to 5GB.

This is the killer feature for grinders. In version 691, the "Synchronized Operation" tool lets you control up to 5 cloned instances of a game simultaneously. If you are farming resources in an MMO, you tap once, and five characters act simultaneously.

Fix: This is usually a GPU rendering conflict. Open Game Space 691 settings, change the "Render Engine" from OpenGL to Vulkan (or vice versa), then restart your phone.