Oh damn, I think I have the same issue as the guys and gals in this thread: [SOLVED] OH3: zwave binding Z-Wave Serial Controller Aeotec Z-Stick Gen5 remains offline - #10 by HaKuNa
Employing the ser2net workaround worked for me. Maybe the cause really is this nrjavaserial issue here: Serial ports getting blo which should be fixed in nrjavaserial v5.3.0. So there is hope that it works when this version makes it into OpenHAB.
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