LF_CPANEL_BANDMIN ="0" (numeral zero or "", but nothing else),
all bandmin directories have been removed,
I can't see any reason in the current CSF code base for these messages to be occurring. If it keeps happening, I suppose you could submit a bug report, but I don't know what they will do to reproduce it. Maybe ConfigServer knows of any other potential cause?
I determined that some of these server warnings are coming from my old server that had not been shutdown yet after we migrated to a new server. They are terminating the old server so we'll see what happens.