Also; we see the 'were not honored' message when this occurs. I think this should help narrow down the sequence of events to get into this condition.

SLF4J: The following set of substitute loggers may have been accessed
SLF4J: during the initialization phase. Logging calls during this
SLF4J: phase were not honored. However, subsequent logging calls to these
SLF4J: loggers will work as normally expected.