#39 Problem with background when conky is started a boot

[Friedrich Thun]

i'm on xubuntu 16.04 and i start the conky daemon using the xfce auto start. sometimes there are some background problems (see this screenshot: https://imgur.com/a/j6yDQ). i don't have this problem every time i start the computer. the problem never ocurs when i start conky manually with 'conky -d'. this is the config file i use:

conky.config =  {
use_xft = true,
font = 'FreeSans:size=10',
xftalpha = 0.8,
update_interval = 1.0,
total_run_times = 0,
own_window = true,
own_window_transparent = true,
own_window_hints = 'undecorated,below,sticky,skip_taskbar,skip_pager',
double_buffer = true,
draw_borders = false,
draw_graph_borders = false,
stippled_borders = 8,
border_inner_margin = 4,
border_width = 1,
alignment = 'top_right',
gap_x = 10,
gap_y = 10,
};

conky.text = [[
${time %A %d %B %Y} - ${time %H:%M:%S}
$stippled_hr
${color #e49c16}CPU:$color $cpu% ${color #ffc11f}${cpubar}
${cpugraph ffc11f 8b4b0b}
${color #e49c16}RAM : $color$mem/$memmax - $memperc% ${color #ffc11f}${membar}
${color #e49c16}Swap : $color$swap/$swapmax - $swapperc% ${color #ffc11f}${swapbar}
${color #e49c16}Prozesse (aktiv) : $color $processes ($running_processes)
$color$stippled_hr
${color #e49c16}IP : ${execi 7200 ~/.conky/publicip.sh}
${color #e49c16}Download : $color ${downspeed eth1} kbyte/s ${offset 60}${color #e49c16}Upload : $color ${upspeed eth1} kbyte/s
${color #FFFFFF}${downspeedgraph eth1 32,150 8b4b0b ffc11f} ${offset 40}${color #FFFFFF}${upspeedgraph eth1 32,150 ffc11f 8b4b0b}
$color$stippled_hr
${color #e49c16}HDD: ${color #FFFFFF}${fs_free /}/${fs_size /} ${color #ffc11f}${fs_bar /}
]];