Bug with is_action_just_pressed or _unhandled_input

### Tested versions

v4.3.rc2.official [3978628c6]

### System information

w10 64

### Issue description

"is_action_just_pressed" is only supposed to return true for a single frame but this is not happening.

In reproducing the problem with the example project, you will see that is_action_just_pressed returns true for 5 or 6 frames.

The problem seems to be that _undhandled_input doesn't seem to execute after the first time until several frames later, which is why it returns true for several frames.


### Steps to reproduce

Run the project

### Minimal reproduction project (MRP)

[nuevo-proyecto-de-juego.zip](https://github.com/user-attachments/files/16494234/nuevo-proyecto-de-juego.zip)

Start by running the attached minimal reproduction project and inspect how is_action_just_pressed and _unhandled_input are used in it. Compare the reported five or six frames of true results with the expected single-frame behavior; done means the reproduction no longer shows repeated true results.

Written by the indexing model from the issue text.