m3u4u performance issues?

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  • First time trying m3u4u for EPG and experiencing performance issues such as buffering and long delays changing channels. I followed the instructions here: https://www.dropbox.com/s/0tlv…laylist%20editor.pdf?dl=0. I created my own Favorites list of channels and was able to populate almost all the TVG IDs. Saved and loaded the M3U file just fine and copied the XML link for the guide and everything looks good from the channel name updates, reorganization and guide. But now I'm experiencing more buffering and when I change channels and try to go back to the previous one there's a long delay. This is on two different Formuler Z8' boxes. When I don't use the M3U file and XML link the box performs much better. Has anyone else encountered this?