Ikea Trådfri things disaperas after opehab reboot

I have an Ikea trådfri gateway, and I connect it to openhab using the binding - everything works as it shall and the gateway thing states online, and I can add things for my connected bulbs. However, after I reboot the gateway there are no trådfri things anymore, and I can find the trådfri gateway in the inbox in paper. I just upgraded to the latest stable version of Openhab, but the things still disapears on reboot.

What can be the problem?

Have a look here see if any ideas help.

Also make sure all you tradfri updates are done. Pending updates can cause this issue.