Image metadata tooltip not triggered when already hovering when exiting lightbox

### Steps to reproduce

1. use a build with https://github.com/matrix-org/matrix-react-sdk/pull/6511
2. hover on image in timeline
3. click: lightbox opens
4. click on an area outside the image in lightbox, but hovering over image in timeline

### Outcome

#### What did you expect?
new tooltip is displayed

#### What happened instead?
is not displayed

### Operating system

arch

### Application version

Element Nightly version: 2022051501 Olm version: 3.2.8

### How did you install the app?

aur

### Homeserver

1.58.1

### Will you send logs?

No

Reproduce the issue by following the timeline-image, lightbox, and outside-click steps, then trace the image metadata tooltip trigger across the lightbox exit. Done means the tooltip appears when the pointer is already over the timeline image after the lightbox closes.

Written by the indexing model from the issue text.