[BUG] Command Keyframes are executed twice if they are at the start of an animation

[LeCarbonator]

Describe the bug
If a command keyframe is set to the very beginning of an animation, it will be executed twice when the animation is played. In case of sound commands, this causes noticeable issues as the sounds are 1 tick apart and duplicated.

To Reproduce

1. Create an animation with a locator
2. Set a command at the start
3. Export and play the animation in-game
4. The command will be executed twice

Expected behavior
The command should only be executed once.

• OS: Windows
• Version v1.0.0