When file synchronization is enabled, initial load of files cannot be turned off, even when sym_file_trigger_router.initial_load_enabled = 0. Each time an initial load is kicked off for table data (either via sym_node_security.initial_load_enabled=1 or via sym_table_reload_request) any file systems are attempted to be initial loaded as well.
Set up a simple 2 tier sync config including simple src->dest file sync. Ensure sym_fle_trigger_router.initial_load_enabled = 0.