Describe the bug

Completely emptying a liquid hopper--whether manually with a bucket, or letting it drain into a tank--won't update a comparator reading from it.

How to reproduce the bug

1. Place a comparator next to a liquid hopper.
2. Add any fluid to the liquid hopper.
3. Drain the liquid hopper.

Expected behavior

The comparator gets updated when the liquid hopper is drained.

Additional details

Originally discovered using 1.18.2-3.6.1-29 on my personal modded instance.

Which Minecraft version are you using?

1.20

Which version of PneumaticCraft: Repressurized are you using?

6.0.0+mc1.20.1

Crash log

No response