Holding Shift while scrolling skips every other hotbar slot on Windows

When holding Shift and scrolling the mouse wheel, the selected hotbar slot moves two slots at a time instead of one.

This only happens while Shift is held. Normal scrolling works as expected.

Steps to reproduce:

1. Start Minecraft on Windows.

2. Join a world and select hotbar slot 1.

3. Make sure Mouse Wheel Sensitivity is set to 1.0.

4. Scroll the mouse wheel one notch at a time without holding Shift.

5. The selection moves normally: 1 -> 2 -> 3 -> 4 -> 5.

6. Go back to slot 1, hold Shift, and scroll one notch at a time.

Expected result:
The selection should still move one slot at a time.

Actual result:
The selection skips every other slot:
1 -> 3 -> 5 -> 7 -> 9.

Additional information:

• This also happens in a vanilla client with no mods installed.

• I tested more than one mouse and got the same result.

• 26.3 Snapshot 3 works normally.

• The issue starts in 26.3 Snapshot 4.

• The issue is present in 26.3 and still occurs in 26.4 Snapshot 2.

• Enabling Discrete Scrolling does not change the behavior.

• Setting Mouse Wheel Sensitivity to 0.5 makes Shift + scrolling move one slot at a time, but normal scrolling then becomes too slow.

• I tested the same behavior on macOS and could not reproduce the issue there.