Just made upgrade of system with lxqt as desktop. Seems works OK except tray - when hovering over icons (e.g. battery status, nm-applet, ...) panel hides like if I move cursor up. No caption is displayed. When I'm quick enough, I'm able to make right button click to get context menu of tray icon before tray hide. I have hiding panel set in settings since first install.
I believe this happens due to a particular bug fix [1], and in part due to the 'tray' plug-in being "deprecated". Please try and see if your applications works with 'statusnotifier' instead (a lot of GTK+-2 applications will not). A hacky workaround (that I use myself) is to revert said fix, but I'm not comfortable including it in the official ebuild. See also: https://github.com/lxqt/lxqt/issues/1812 1. https://github.com/lxqt/lxqt-panel/commit/b8c33e97cc7be8bddde04234240d776a100dd507
The corresponding upstream bug has been closed: "The tray plugin is obsolete. Add Status Notifier to the panel." lxqt-base/lxqt-panel-0.15.1 is not part of MPT any more. Do these problems persist with lxqt-base/lxqt-panel-0.17.1-r1:0 ? Using the recommended alternative, upstream bug suggests "no". LXQt stable version 1.0 has been published today ... Suggest to close this bug as OBSOLETE.
REFERENCE: https://bugs.gentoo.org/744382#c2
This should still be an issue when using the (obsolete) tray plugin, or/and when using applications that don't work with statusnotifier, yeah, but I suppose we can indeed close this up here.