Version info
Java version:

$ java -version
openjdk version "1.8.0_242"
OpenJDK Runtime Environment (build 1.8.0_242-b08)
OpenJDK 64-Bit Server VM (build 25.242-b08, mixed mode)

Minecraft Forge version: 1.12.2-14.23.5.2847

Describe the bug
Shortcuts do not work after restarting game (rejoining server or reopenning world does not break them). After openning shortcut menu they work again.

To Reproduce
Steps to reproduce the behavior:

1. Create shortcut for flight control
2. Restart game
3. Try using shortcut
4. Open shortcut menu (now shortcuts work again)

Expected behavior
Shortcuts to be always available.