Reproduction steps:
1. Open the attached “Repro“ project
2. Open the “Assets/Scenes/SampleScene.unity“ Scene
3. Enter the Play Mode
4. Connect 3 controllers by pressing the D-pad down button (remember the sequence in which they were connected)
5. Observe the indexes of the connected players in the Game View
6. Disconnect the first 2 controllers by pressing the D-pad up button
7. Connect one of the disconnected controllers again
8. Observe the indexes of the connected players in the Game View

Expected result: Smallest unused index will be used for the newly connected device, which should be 0. The text shows “Connected Players: 0, 2“
Actual result: The newly assigned index is calculated by subtracting 1 from the previous smallest index. The text shows “Connected Players: 1, 2“

Reproducible with: 1.12.0, 1.13.0, 1.13.1, 1.14.0 (2022.3.63f1)

Reproducible on: M1 Max MacOS 15.5 (Tested by CQA)
Not reproducible on: No other environment tested