I also experienced some problems with XFCE 4.13 in Fedora 29:
- weird colors in the workspace switcher (it is difficult to understand what is the current workspace)
- icons in systray do not fit well
-
windows sometimes forget their maximization status: if a window is
maximized and then "unmaximized", sometimes that window remains
maximized (currently, this happened only with xfce-terminal)
-
some apps has strange behaviour; for instance, the welcome screen of
AndroidStudio does not appear at the center of the screen and the menu
of the AndroidStudio window looks shifted towards the left
- the XFCE's Applications Menu takes long to appear the first time
Best,
Marco