Comment 13 for bug 1795135

Not sure it's helpful to add all panel-like applications that are affected by this problem to the bugreport - unless of course you want to track which applications implemented the same workaround (which seems to be the only known workaround anyway - if you don't want to intercept X11's signals manually).

Let me formulate the bug more generally:
All windows with coordinates of 0x0 have issues with xorg believing the cursor leaves the window because the lower boundaries are not clamped to integers. Instead the subpixel rendering of xinput2 results in those negative coordinates I mentioned before. I'm convinced *all* applications have this problem and I've discussed about the topic with the Gtk+ developers as well. One of the upstream bugreports even contains a small reproducer that is not a panel at all.