mouse flickers while hovering over corner of message actions

### Steps to reproduce

1. Open any chat
2. Move mouse cursor to the bottom right corner of any message action
3. Observe the cursor rapidly switching from "pointer" to "hand" and back

[Screencast from 2023-08-29 14-19-16.webm](https://github.com/vector-im/element-web/assets/862483/1794c305-48f3-49a5-996e-41ebcddc6104)

### Outcome

#### What did you expect?
Stable mouse cursor state on all positions
#### What happened instead?
Mouse cursor flickers

### Operating system

Arch Linux

### Application version

Element version: 1.11.38 Olm version: 3.2.14

### How did you install the app?

Arch Linux "element-desktop" package

### Homeserver

acmelabs.space

### Will you send logs?

Yes