Disabling multiple data packs quickly only disables the last one

The bug

When you run the /datapack disable command for two or more data packs quickly after each other, it only seems to remember the last command and the other data packs(s) will not be disabled.

How to reproduce

1. Have two data packs enabled

2. Disable them both quickly after each other

3. Notice that the game reloads once and that the first data pack is still enabled.