Icon disappears when top bar alpha or style(hover button) changes
On Ubuntu 18.04 with Gnome 3.28.4, installed from https://extensions.gnome.org/, when alpha of top bar changes the icon disappears. This happens when this is the only extension active (turned everything else off in Tweaks), so it should not be a conflict with another extension.
Further, the icon also disappears while hovering the menu(icons are brighter) when alpha is full.
Full alpha, hovered menu (mouse not present in screenshots), icon gone.
I get that this is not needed in Gnome 3.34+, but Ubuntu 18.04 has not updated (if it ever will) and my company will stay on 18.04 for the foreseeable future. I guess I could look into this myself if I can get some pointers on where the issue might be.
Edited by Skillzore