Window movement is broken on macOS on latest master

**Describe the bug**
Window moves faster than the cursor grabbing it. This results in a cursor being offset from the initial grab position.

**To Reproduce**
Steps to reproduce the behavior:
1. Compile demo on the latest master on macOS
2. Grab a window
3. Move it a bit
4. See a position desync between the cursor and the window

**Expected behavior**
The window should exactly follow the cursor.

**Screenshots**
https://github.com/user-attachments/assets/7ec3d599-c97b-446c-b2a4-a3a85367fbe6

**Desktop (please complete the following information):**
- OS: macOS
- Version: latest beta

Start by compiling the demo on macOS using the latest master and reproduce the cursor/window position desync described in the report. Trace the window movement path from the demo while dragging, then verify that the window follows the cursor exactly without an offset.

Written by the indexing model from the issue text.