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 14214] Spanish options do not start with capital letters (2018/05/25 04:41)
• [Bug 13325] Keyboard shortcuts Super-M and Super-D are not working (if configured in Window Manager to minimize all windows) (2018/05/16 12:16)
• [Bug 14366] XFCE 4.12 won't start properly after enabling Composition pipeline nvidia 390.48 (2018/05/01 00:05)
• [Bug 14360] portrait images incorrectly cropped when used as background (2018/04/27 00:03)
• [Bug 14313] When desktop wallpaper is set to randomize at an interval, manually selecting one doesn't reset the timer (2018/03/30 06:50)
• [Bug 13928] GLib-CRITICAL **: g_base64_encode_step: assertion 'in != NULL' failed (2018/02/24 22:06)
• [Bug 12516] mouse roller scrolls windows instead of lines (2018/02/20 20:35)
• [Bug 12672] Fail copy/paste in all, more if paste to console xfce4-terminal (2018/02/18 11:30)
• [Bug 12524] New Custom Actions require xfdesktop restart to appear (2018/02/12 23:14)
• [Bug 12439] Desktop freeze sometimes (2018/02/08 14:36)
• [Bug 12117] The default desktop startup screen causes damage to monitor! (2018/02/08 10:59)
• [Bug 12697] Desktop icons text is misaligned with text shadow and icon itself (2018/02/05 21:31)
• [Bug 13896] Xfdesktop is unusable on an touchscreen device (2018/02/04 11:43)
• [Bug 14180] Bug with selection when pressing both RMB and LMB together (2018/01/21 14:45)
• [Bug 14121] Enable placing desktop icons on monitor of choice (2017/12/25 17:16)
• [Bug 14091] Desktop menu is displayed once in two when Icon Type pref is None (2017/12/16 21:11)
• [Bug 13929] Xfdesktop drag-and-drop copies to non-thunar file managers, rather than moving the file. (2017/12/14 01:29)
• [Bug 13651] different paddings in desktop menu (2017/12/08 01:08)
• [Bug 13385] Menus are blocking shortcuts (2017/12/04 22:11)
• [Bug 13934] launcher problem that contain address with space symbol (2017/12/03 19:36)

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.