Steps to reproduce:

1. Create new Graph prototype widget with option "Dynamic item"
2. Select Zabbix server graph prototype " Interface {#IFNAME}: Network traffic" or other
3. Save dashboard
4. In dashboard control choose Zabbix server host
5. In dashboard control choose some host which doesn't have this graph prototype

Result:
Widget content is "No permissions to referred object or it does not exist!" but widget header remains from Zabbix server host "Zabbix server: Interface {#IFNAME}: Network traffic".

Widget header "Graph prototype" appears only after page refresh.
Expected:
Widget header is "Graph prototype" at once after switching host