Discovery doesn't work


Discovery rule at openhab app doesn’t work properly, openhab app found OH2, after that app tried to connect to OH2, and nothing happened. I mean it’s no errors and the same time i can see only white screen without any items. If go to the settings (no difference will I changed settings or not, actually I just need to do some action) and after that back to the main screen - items become visible.

Openhab2 installed about a week ago (not beta4) on orange pi (armbian with all updates), java, ios, openhab app - latest.
Remote connect via works properly.

One more note, if ip address was changed by dhcp-server on device where OH2 installed, discovery in ios app didn’t find OH2 and after that ios app starting to connect to remote URL. It helps restart the service openhab2