After using the Game Mode Switcher with F3 + F4, pressing F3 once won't toggle the debug information. It must be pressed again to perform the intended function. This doesn't affect any of the debug key combinations (F3 + A, F3 + Q, etc.); they will perform their intended functions on the first try even after using the Game Mode Switcher.

How to reproduce:

1. Be in a world where you have permission to use the Game Mode Switcher
2. Open it by pressing F3 + F4 (it doesn't matter what you switch to, or even if you switch at all)
3. Press F3 once to toggle the debug information, and it won't work
4. Press F3 again, and this time the debug information should be properly toggled

Note: Pressing any debug key combination besides F3 + F4 can be substituted for step 3. The combination will still perform its intended function, as previously stated, and it will "clear" F3 to be used properly on the next press.