I downgraded the binding to 1.10.0 by placing org.openhab.binding.onewire-1.10.0.jar into addons/:
openhab> bundle:list | grep One
238 │ Active │ 80 │ 1.10.0 │ openHAB OneWire Binding
openhab>
Around the time onewire stops working, I see
2018-02-28 02:59:55.230 [WARN ] [org.apache.karaf.services.eventadmin] - EventAdmin: Blacklisting ServiceReference [{org.osgi.service.cm.ManagedService, org.osgi.service.event.EventHandler}={event.topics=openhab/*, service.pid=org.openhab.onewire, component.name=org.openhab.binding.onewire.refreshservice, component.id=14, service.id=348, service.bundleid=238, service.scope=bundle} | Bundle(org.openhab.binding.onewire_1.10.0 [238])] due to timeout!
in the log. I’m going to try the workaround for disabling timeouts as described here.