BUG in Chrome: Popups are not visible on the screen

Hi everybody,

We are having this bug in Chrome and Brave browsers (Mozilla does not have it):

When a popup called (for example, View Visitor Profile), it appears for a split second, then quickly slides up outside of the screen and is not visible anymore. The only thing we can see is dark overlay covering the page content.

Here is a screencast to demonstrate (some parts of the page are hidden for confidentiality reasons): https://drive.google.com/file/d/1JcmzxzDMYJvgOX4FxjHtGfxgSrG8gkN5/view

Thank you for looking into it.