I have been experiencing a similar problem for the past couple of days. Don't know if it's exactly the same bug.
package details: unity 3.8.12 launcher stops auto-hiding but IS responsive. All maximized windows expand to the whole screen leaving their left part hid by launcher (so the launcher is fixed on the left and the maximized windows expand UNDERNEATH it). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/744325 Title: Unity Launcher stops autohiding and is not responsive -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs