command alerts only once but not until the file is changed

The command runs successfully only 1 time. The second time we run the command it doesn’t show
any errors or warnings as in principle check_logfiles scans a log file until the end-of-file is reached. The offset will then be saved in a so-called seekfile. The next time check_logfiles runs this offset will be used as the starting position inside the log file.

I found this to be a bug as I believe until the log file gets updated or appended, the alert shouldn’t disappear. But in reality it only sends an alert once and the next time it shows “OK – no errors”.