If you fire a dispenser, that has more than one glowstone, into a respawn anchor and power it once it will use 2 glowstone and only restores one charge...
Steps to reproduce:
- Place a dispenser pointing into a respawn anchor
- Put more than one piece of glowstone in the dispenser
- Power the dispenser, observe the amount of glowstone used...
Expected result: one piece of glowstone is used and one charge is returned
Outcome: two glowstone is used and one charge is restored
Happens using any power source - Lever, stone button, wood button
Reproduced on Windows 10 and Android