Frequent crashes of Openhabian

My first install of openhabian seemed to be rather stable. Then a few weeks ago I made a completely new install, from the then latest distro and I encountered increasing problems with stability.

Initially i frequently lost contact through the openhab app, forcing me to close and restart the app, but lately I need to completely restart openhabian several times a day.

The app gives me the following info:
Rest API version: 0.9.0.b4
openhab UUID: e3919c38-c758-4bca-86ce-cd46a07a28fd
The earlier opnhab distro that seemed to run smoothly had:
UUID 2a3c7f97-db0e-4a1c-8d0e-49c64c380319

the openhab log only gives two recurring warnings and one error:

2017-06-24 00:29:22.145 [WARN ] [systeminfo.handler.SysteminfoHandler] - Channel with ID process#used can not be updated! No information available for the selected device.
2017-06-24 00:29:24.231 [WARN ] [ome.core.thing.internal.ThingManager] - Cannot delegate update '2017-06-24T00:29:24.213+0200' for item 'CurrentDate' to handler for channel 'ntp:ntp:demo:dateTime', because no thing with the UID 'ntp:ntp:demo' could be found.
2017-06-24 00:29:25.125 [ERROR] [systeminfo.handler.SysteminfoHandler] - No information for channel process#load0
org.openhab.binding.systeminfo.model.DeviceNotFoundException: Error while getting information for process with PID 0
	at org.openhab.binding.systeminfo.model.OshiSysteminfo.getProcess(OshiSysteminfo.java:83)[208:org.openhab.binding.systeminfo:2.0.0]
	at org.openhab.binding.systeminfo.model.OshiSysteminfo.getProcessCpuUsage(OshiSysteminfo.java:515)[208:org.openhab.binding.systeminfo:2.0.0]
	at org.openhab.binding.systeminfo.handler.SysteminfoHandler.getInfoForChannel(SysteminfoHandler.java:407)[208:org.openhab.binding.systeminfo:2.0.0]
	at org.openhab.binding.systeminfo.handler.SysteminfoHandler.publishDataForChannel(SysteminfoHandler.java:250)[208:org.openhab.binding.systeminfo:2.0.0]
	at org.openhab.binding.systeminfo.handler.SysteminfoHandler.publishData(SysteminfoHandler.java:243)[208:org.openhab.binding.systeminfo:2.0.0]
	at org.openhab.binding.systeminfo.handler.SysteminfoHandler.access$1(SysteminfoHandler.java:237)[208:org.openhab.binding.systeminfo:2.0.0]
	at org.openhab.binding.systeminfo.handler.SysteminfoHandler$1.run(SysteminfoHandler.java:215)[208:org.openhab.binding.systeminfo:2.0.0]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[:1.8.0_131]
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)[:1.8.0_131]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)[:1.8.0_131]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)[:1.8.0_131]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_131]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_131]
	at java.lang.Thread.run(Thread.java:748)[:1.8.0_131]

Oddly, the last eventlog entries seem from hours before.
The ERROR appears related to the systeminfo binding, but I already had problems before I installed that.
I went back to my previous openhabian install put the latest config files on it, and my problem seems gone
Anybody else having this problem?