Linux naming of files is case-sensitive.
You should also omit spaces in the names for proper compatibility.
Name your files correctly and there will be no problem.
Linux is case sensitive whereas windows is not. In TV headend I manually renamed all the icons to lowercase. Are all your Icons stored locally? if so it maybe possible to run a bash script to scan the .m3u and rename your Icons accordingly.
now all channel names are large and .png names can also be large
but such a bash is a great idea!!!
maybe the addon with the settings
enter the location of the folder with the logo
scan pvr or other tv client
and this wonderful ** FreeCommander ** ** https: //freecommander.com/en/downloads/**
replaces file names with large, small, 1 large first name, second large second name, etc …