Drop down menus not working

I found some duplicate posts here and I am sorry if I’m violating the guidelines, but since all of these posts were closed without any comments, I would like to remind of this issue.

Description of the issue:
Drop down menus on some sites are not working properly (in particular, on pagerduty.com dashboards). The menu closes when the mouse button is pressed down and not yet released. When the button is released, nothing happens, the menu item is not activated.
Exact URL of the website in question:
https://your-accont-name.eu.pagerduty.com/incidents (login required)
Did the issue present with default Shields settings? (yes/no)
Does the site function as expected when Shields are turned off?
Is there a specific Shields configuration that causes the site to break? If so, tell us that configuration. (yes/no):
Does the site work as expected when using Chrome?
Yes. Chromium, to be precise. And Firefox, too.
Brave version (check About Brave):
Version 1.33.87 Chromium: 96.0.4664.45 (Official Build) beta (64-bit), running on Debian GNU/Linux 10.