inotifywait & parallel fails with many jobs

Hi, I am monitoring a directory and create several 1000 files within.

Those files must be processed but the problem can be reduced to a simple echo
Code:inotifywait -q -e create -e moved_to -m --format '%f' $dir | parallel -u echohttps://www.gnu.org/software/paralle...-dir-processor

However, I cannot echo all files:

40k Files are generated
and only about ~24 k are displayed.

What am I missing?

Best Regards