Dispenser with filled bucket at Y=319 facing upwards replaces filled bucket with empty bucket despite no fluid being placed

Summary:
An upwards facing dispenser at Y=319 containing a water bucket or lava bucket replaces the filled bucket with an empty one despite no fluid being placed when activated.

Steps to Reproduce:

1. Place a dispenser facing upwards at Y=319
2. Place a water/lava bucket inside the dispenser
3. Place a button/lever on the dispenser
4. Activate the dispenser
5. Open the dispenser

Observed Results:
The water/lava bucket is replaced with an empty bucket.

Expected Results:
The water/lava bucket should be ejected, like the powder snow bucket and Java Edition.