I have files bug reports for the “Show Applications” animation being glitchy and it is a confirmed bug by the GNOME devs:
They know about it and it is present even without any extensions or tweaks.
As you can see in the GitLab issue (it includes videos). The animation is glitchy and basically destroys the experience especially for new users. I always have to tell my friends that are new to disable it.
The GNOME team doesn’t seem to rush to fix that bug, I guess it’s because they are focused on GNOME 40(?).
That bug is present on all distros that use GNOME including Manjaro.
It also isn’t glitchy the first time you open “Show Applications”, its basically just random.
But anyway I would suggest that it is disabled on new installations on Manjaro GNOME
What does Dash to Dock have to do with the Show Applications button in the default dock? You never mentioned Dash to Dock. It’s a known issue with Dash to Dock, please don’t clutter up the GNOME Gitlab issues.
Your post tile then should be something like, Animate Show Applications should be disabled by default in Dash to Dock. Please make edits accordingly.
In the issue, it is confirmed it is not Dash to Dock or any other extension’s fault. Its simply GNOMEs fault. But extensions like Dock (which are by default installed on Manjaro GNOME) can disable that animation