Issue description:

World locks up and becomes impossible to load (Stuck at 100%)

Steps to reproduce:

1. Place down portable grid with disk
2. reload world.

Version (make sure you are on the latest version before reporting):

• Minecraft:1.16.1
• Forge:32.0.75
• Refined Storage:1.9.2

Problematic code at PortableGridTile line 544.

Can be solved by removing the disk.

If anyone run into deadlock can't open server
can workaround by setting openUsage > capacity