Solaar keeps "forgetting" the receiver after minutes

Created by: eera5607
Hi! Thank you for your work on this app. I have the following issue:
No Logitech receiver found
Disconnect and connect again the Unifying Receiver.
Turn the Logitech K800 off and on. Everything works fine now.
Minutes later the first point again. No suspension involved.
solaar --debug results with only hidrawX chaning between cases (hidraw3, hidraw4 etc.):
/usr/share/solaar/lib/solaar/gtk.py:33:
 PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  __import__(module)
13:12:07,820     INFO [MainThread] root: language en_US (UTF-8), translations path None
13:12:07,850     INFO [MainThread] solaar.ui: application /io/github/pwr/solaar, registered True
/usr/share/solaar/lib/solaar/ui/notify.py:33: PyGIWarning: Notify was imported without specifying a version first. Use gi.require_version('Notify', '0.7') before import to ensure that the right version gets loaded.
  from gi.repository import Notify
/usr/share/solaar/lib/solaar/ui/tray.py:72: PyGIWarning: AppIndicator3 was imported without specifying a version first. Use gi.require_version('AppIndicator3', '0.1') before import to ensure that the right version gets loaded.
  from gi.repository import AppIndicator3
13:12:07,868     INFO [MainThread] solaar.ui.tray: using AppIndicator3
13:12:07,869     INFO [MainThread] solaar.ui.notify: starting desktop notifications
13:12:07,879     INFO [MainThread] solaar.upower: connected to system dbus, watching for suspend/resume events
13:12:07,880     INFO [MainThread] solaar.listener: starting receiver listening threads
13:12:07,881     INFO [MainThread] solaar.listener: receiver event add DeviceInfo(path=u'/dev/hidraw3', vendor_id=u'046d', product_id=u'c52b', serial=u'', release='1207', manufacturer='Logitech', product='USB Receiver', interface=2, driver=u'logitech-djreceiver')
13:12:07,884     INFO [ReceiverListener:hidraw3] logitech_receiver.listener: started with <UnifyingReceiver(/dev/hidraw3,12)> (12)
13:12:07,884     INFO [ReceiverListener:hidraw3] solaar.listener: <UnifyingReceiver(/dev/hidraw3,12)>: notifications listener has started (12)
13:12:07,888     INFO [ReceiverListener:hidraw3] logitech_receiver.receiver: <UnifyingReceiver(/dev/hidraw3,12)>: receiver notifications enabled => ('wireless', 'software present')
13:12:07,892     INFO [ReceiverListener:hidraw3] solaar.listener: status_changed <UnifyingReceiver(/dev/hidraw3,12)>: present, No paired devices. (0) 
13:12:07,893     INFO [ReceiverListener:hidraw3] logitech_receiver.receiver: <UnifyingReceiver(/dev/hidraw3,12)>: found new device 3 (2010)
13:12:07,893     INFO [ReceiverListener:hidraw3] solaar.listener: Notification(3,41,04,311020) triggered new device <PairedDevice(3,2010,K800)> (keyboard)
13:12:07,894     INFO [ReceiverListener:hidraw3] solaar.listener: status_changed <UnifyingReceiver(/dev/hidraw3,12)>: present, 1 paired device. (0) 
13:12:07,940    ERROR [ReceiverListener:hidraw3] logitech_receiver.base: write failed, assuming handle 12 no longer available
13:12:07,941    ERROR [ReceiverListener:hidraw3] logitech_receiver.listener: processing Notification(3,41,04,311020)
Traceback (most recent call last):
  File "/usr/share/solaar/lib/logitech_receiver/listener.py", line 185, in run
    self._notifications_callback(n)
  File "/usr/share/solaar/lib/solaar/listener.py", line 207, in _notifications_handler
    _notifications.process(dev, n)
  File "/usr/share/solaar/lib/logitech_receiver/notifications.py", line 54, in process
    return _process_device_notification(device, status, notification)
  File "/usr/share/solaar/lib/logitech_receiver/notifications.py", line 97, in _process_device_notification
    return _process_hidpp10_notification(device, status, n)
  File "/usr/share/solaar/lib/logitech_receiver/notifications.py", line 174, in _process_hidpp10_notification
    status.changed(active=link_established)
  File "/usr/share/solaar/lib/logitech_receiver/status.py", line 255, in changed
    self[KEYS.NOTIFICATION_FLAGS] = d.enable_notifications()
  File "/usr/share/solaar/lib/logitech_receiver/receiver.py", line 274, in enable_notifications
    flag_bits = _hidpp10.get_notification_flags(self)
  File "/usr/share/solaar/lib/logitech_receiver/hidpp10.py", line 310, in get_notification_flags
    flags = read_register(device, REGISTERS.notifications)
  File "/usr/share/solaar/lib/logitech_receiver/hidpp10.py", line 142, in read_register
    return device.request(request_id, *params)
  File "/usr/share/solaar/lib/logitech_receiver/receiver.py", line 281, in request
    return _base.request(self.receiver.handle, self.number, request_id, *params)
  File "/usr/share/solaar/lib/logitech_receiver/base.py", line 340, in request
    write(ihandle, devnumber, request_data)
  File "/usr/share/solaar/lib/logitech_receiver/base.py", line 171, in write
    raise NoReceiver(reason=reason)
NoReceiver: {'reason': OSError(32, 'Broken pipe')}
13:12:07,941    ERROR [ReceiverListener:hidraw3] logitech_receiver.base: read failed, assuming handle 12 no longer available
13:12:07,941  WARNING [ReceiverListener:hidraw3] logitech_receiver.listener: receiver disconnected
13:12:07,941     INFO [ReceiverListener:hidraw3] solaar.listener: <UnifyingReceiver(/dev/hidraw3,12)>: notifications listener has stopped
What can it be? Thanks for the help.
Edit: forgot to mention that I'm on Ubuntu 18.04. Recent fresh install.