Action bar download button sometimes opens image below action bar instead

### Steps to reproduce

1. Hover over image posted immediately after another image
2. Click on the download button in the action bar that appears

### Outcome

#### What did you expect?
I expect the download button to download the image I hovered over
#### What happened instead?
Sometimes it opens the image that the action bar overlaps instead

### Operating system

Arch Linux

### Browser information

Vivaldi 4.3.2439.63 (Chromium 94.0.4606.114)

### URL for webapp

_No response_

### Application version

1.9.4

### Homeserver

_No response_

### Will you send logs?

No

Reproduce the issue by hovering over an image immediately after another image and clicking the action bar download button in Element Web 1.9.4, using the reported Vivaldi environment if available. Trace the action bar's download handling and the overlapping image click behavior; done means the button consistently downloads the hovered image rather than opening the image beneath it.

Written by the indexing model from the issue text.