When experiencing bugs with the xfdesktop application, your way of helping things getting fixed is to report a bug about it in bugzilla. Note: For this you will need to have/create an account.

• [Bug 15152] xfdesktop: g_type_check_instance_is_fundamentally_a(): xfdesktop killed by SIGSEGV (2019/02/21 04:06)
• [Bug 13928] GLib-CRITICAL **: g_base64_encode_step: assertion 'in != NULL' failed (2019/02/20 21:41)
• [Bug 15116] Xubuntu 18.10 broke dual-screen dual-desktop configuration. (2019/02/07 14:38)
• [Bug 15060] xfdesktop crashing after some time, any further xfdesktop commands give error until restarted (2019/02/06 03:03)
• [Bug 14919] URLs dropped on desktop should create a launcher OR download the URL, depending (2019/01/23 09:29)
• [Bug 15073] Minimised icons appearing on the destkop, even though the program isn't minimised in Xubuntu 18.04.1 (2019/01/22 17:56)
• [Bug 13787] Cannot change the background image (2019/01/20 19:44)
• [Bug 14863] Libre Office pulses at me (2018/12/19 04:41)
• [Bug 11266] [bug] Desktop icons order resets (2018/12/19 04:22)
• [Bug 14950] When logging in with Nvidia's full composition pipeline enabled, logging in freezes the desktop until tty is changed (2018/12/07 02:07)
• [Bug 14944] Suggestion: add a delay before closing the terminal for the desktop icons with the 'Run in terminal' property set. (2018/12/05 10:33)
• [Bug 13929] Xfdesktop drag-and-drop copies to non-thunar file managers, rather than moving the file. (2018/11/28 20:53)
• [Bug 14813] Setting for spacing icons and icons name ellipsize (2018/11/19 11:24)
• [Bug 12516] mouse roller scrolls windows instead of lines (2018/11/13 04:33)
• [Bug 14844] Potential memory leak when repeatedly reconnecting HDMI cable (2018/11/12 16:44)
• [Bug 14868] Background "Spanning screens" option does not work (2018/11/12 14:42)
• [Bug 14838] Wallpaper scaling fails if image contains EXIF markup for rotation. (2018/11/04 13:22)
• [Bug 14833] Desktop hangs after login with a HiDPI display (2018/11/04 06:18)
• [Bug 12631] Desktop background directory won't stick (2018/10/21 03:54)
• [Bug 14180] Bug with selection when pressing both RMB and LMB together (2018/10/19 02:54)

If your bug/problem has not been reported before, report a new bug. Please ensure that you disclose any information that might be relevant for developers reading the bugreport, e.g. what distribution you're using, what package-version of xfdesktop or related Xfce libraries etc. To report a new bug, go here.