UDP-Inbound Data let OH2 Log freeze

I’ve started to practice with UPD-connections and I got OH2 to receive the data i sent to it.
All works like a charm except the case, that the OH2 log starts to freeze after receiving the first data. A restart of OH2 don’t fix this problem. It works only if I stop OH2 manually, delete the log-file and restart it manually again.

The logfile shows following lines, before it freeze/hangs:

We will accept data coming from the remote end*
We will accept data coming from the remote end with mask*
This is the message.

The last line “This is the message.” is the data I sent to the OH2 Item via UDP:

String something "Test String[%s]" {udp="<[*:default]"}

So on my Linux-device/ Raspberry Pi the Log doesn’t show anything below this line, but if I look at the log-File on any other device, like a Windows PC, it shows me following lines at the end, starting with the line where the log starts to freeze:

2018-04-08 09:44:39.841 [INFO ] [.eclipse.smarthome.model.script.TEST] - This is the message.
//// Massive Space between these Lines ///////
2018-04-08 09:44:39.948 [INFO ] [eclipse.smarthome.model.script.Debug] - ON
2018-04-08 09:46:00.766 [INFO ] [.eclipse.smarthome.model.script.TEST] - This is the message v.2.

Where does this really large space comes from? And why doesn’t show the log the new entries after this specific line?