flickering mouse cursor when I hover over an event

### Steps to reproduce

1. hover over an event in the timeline
2. mouse cursor flickers annoyingly

(I tried to record a video, but it doesn't show up)

### Outcome

#### What did you expect?

mouse cursor doesn't flicker

#### What happened instead?

mouse cursor flickers annoyingly

### Operating system

Ubuntu 22.04

### Application version

Element Nightly version: 2022071101 Olm version: 3.2.8

### How did you install the app?

nightly debian

### Homeserver

_No response_

### Will you send logs?

No