Moving from the world onto a window, the world mouseover's loss reached the tooltip a frame after the window's OnEnter, so a gate kept the fade off any tooltip the world had not put up.
In 1.12.1 the hover walk runs the old frame's leave before the new frame's enter (`0x766229`, `0x766239`). The WorldFrame's leave (`0x483b10`) runs OnLeave, then publishes the empty mouseover, whose publisher fades GameTooltip whoever holds it (`0x492890` → `0x530ae0`). A nameplate's leave publishes first (`0x7cb8b0`); the Minimap's hides the tooltip (`0x4eb880`), and its probe drops a held blip on a miss (`0x4eb0c0`).
The VM now holds the published mouseover and runs these leaves in the walk, the hide and every mouse disable, freelook's plates included (`0x60f830`); the ownership gate is gone.
Tests: OnEnter no longer sees "mouseover", an addon tooltip fades on a change, blip and Minimap leaves hide it.
Fixes#901🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
