I'm using Fedora 25 Workstation 64-bit with all latest updates installed.
When using Gnome shell with disabled animations, some types notifications are not displayed at all. This is very easy to reproduce:
1) Run "gnome-shell-extension-tool -c" and create a sample extension.
2) Enable your extension in Gnome Tweak Tool and restart the shell/
3) A gear icon appears in your systray. When you click on it, a pop-up "Hello world" emerges and fades out in about 2 seconds.
4) Now go to Gnome Tweak Tool and disable the animations.
5) Click on the gear icon again. Nothing happens!
6) Enable the animations and things work again.
7) This happens both with Wayland and X11
Apparently Tweener.addTween(text, ...) does not work when animations are disabled. This is clearly not how it is supposed to be. If I choose to disable animations I certainly don't want to miss some (possibly important) messages from my extensions.
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