I have experience both these problems recently.
At least twice, I have had sessions in which a newly created program doesn't show up in the Program Details page. Clearing the Java cache did not fix the issue. Rebooting the ISY did.
Also, when I came home today, the MEM and ERR lights were flashing, indicating network issues. FWIW, none of my other network devices appeared to be having problems. Power-cycling fixed the issue.
I am running v2.8.2