Kibana version: 7.4.0

Elasticsearch version: 7.4.0

Server OS version: CentOS 7

Browser version: Chrome, Firefox, IE11, Edge

Browser OS version: Windows 10

Original install method (e.g. download page, yum, from source, etc.): rpm default dist

Describe the bug: Only on the "Filter out value" magnifying glass icon on the far right in Discover the tooltip and icon itself flicker or flash. At times is even makes it very difficult to select the icon.

Steps to reproduce:

1. Go to Discover with an index pattern with data
2. mouse-over some fields in the field pane and add them to the doc table view
3. mouse-over the right right minus magnifying glass icon.

Expected behavior: The tooltip "Filter out value" should appear. It does but either disappears or flickers on and off (taking the icon with it)

Screenshots (if relevant):
Firefox

Firefox with debug panel

Chrome

IE11

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):

Any additional context: