The same issue in the new, non-Unity desktop:
https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-
dock/+bug/1813212
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https://bugs.launchpad.net/bugs/996158
Title:
The bug here is about unity, please open a new ticket if you have
similar issues in newer versions not using Unity
** No longer affects: gnome-shell-extension-ubuntu-dock (Ubuntu)
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** Summary changed:
- Unity launcher with auto-hide using mouse is unreliable
+ Unity or Ubuntu dock launcher with auto-hide using mouse is unreliable
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