Middle mouse button drag in the Tilemap Palette window results in errors

Steps to reproduce:
1. Open the Tile Palette window (Window>2D>Tile Palette)
2. Dock it next to the Scene View
3. Middle mouse button drag in the Scene View
4. Middle mouse button drag on the empty area in the Tile Palette window

Expected result: nothing happens
Actual result: two errors are thrown

Handles.GetClosestPickingID called outside an editor OnGUI
UnityEditor.EditorApplication:Internal_CallGlobalEventHandler ()
Assertion failed on expression: 'device.IsInsideFrame()'
UnityEditor.EditorApplication:Internal_CallGlobalEventHandler ()

Reproducible with: 2022.2.0a14, 2022.2.0b1, 2023.1.0a6

Not reproducible with: 2020.3.36f1, 2021.3.3f1, 2022.1.4f1, 2022.2.0a13