The app switcher icon is 16px instead of 24px

Issue Summary

Starting with Jira 8.12.0, the app switcher icon in the top left corner was enlarged from 16px to 24px, along with the rest of the menu bar icons (see JRASERVER-71919 and its resolution as "Not a bug").

In Jira 8.22.0 the app switcher icon reverted to 16px, although the other menu bar icons remained as the larger size.

This is reproducible on Data Center: yes

Steps to Reproduce

1. Set up an application link in Jira
2. Observe the size of the app switcher icon in the top left corner.

Expected Results

The app switcher icon should be 24px in size.

Actual Results

The app switcher icon is 16px in size.

Workaround

Add the following to the announcement banner:

<style>
.aui-header .aui-icon {
    --aui-icon-size: 24px;
}
</style>