why my s20+ wallpaper keep dissappearing????

[dap1208]

im already reboot few times!!!on/off my phone!!!check the wallpaper setting!!!but the problem still the same 'when I try and try to put on a new wallpaper the wallpaper will suddenly disappear ' wtf is that huhh???can someone please give a useful HELP???

[AndrewL]

@dap1208: Is this issue occurring with your Home Screen, Lock Screen, or both? Are you using an image from your Gallery, or a Featured/Downloaded option? Have you tried heading to Settings > Wallpaper > Wallpaper Services > Dynamic Lock Screen, and disabling this feature to see if this helps? 

[dap1208]

normally im using the theme from galaxy themes...but the wallpaper of the theme is gone but the theme is still here, so weird...ur suggestions are tried and prob still same...now I found a new problem that is the missed call notification won't show up already don't know why b4 still fine...