Bug #7452
Updated by krileon over 6 years ago
The CSS fix for modal windows when open is to set position to initial for the body, but it needs to use !important flag to prevent existing CSS or inline CSS from breaking this.
https://www.joomlapolis.com/forum/255-developer-members-support/240475-solved-message-display-on-small-screen#310368
Specifically this is the CSS applied by class cbTooltipModalOpen.